diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a2cdaa87f..7b9c4678d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # CHANGELOG
 
+## master
+
+Contributed:
+
+- Export `WellKnownChain` for `substrate-connect` (Thanks to https://github.com/josepot)
+- Add support for `{entries, keys}Paged` in `.at` (Thanks to https://github.com/xlc)
+- Align `WeightsPerClass` interface on `maxExtrinsic` (Thanks to https://github.com/HackFisher)
+
+Changes:
+
+- Cater for `DispatchError` with `error` as `[u8; 4]`
+
+
 ## 7.14.3 Mar 28, 2022
 
 Changes:
diff --git a/packages/types-augment/src/registry/interfaces.ts b/packages/types-augment/src/registry/interfaces.ts
index 9a334b8077..c544a48068 100644
--- a/packages/types-augment/src/registry/interfaces.ts
+++ b/packages/types-augment/src/registry/interfaces.ts
@@ -53,7 +53,7 @@ import type { Bid, BidKind, SocietyJudgement, SocietyVote, StrikeCount, Vouching
 import type { ActiveEraInfo, CompactAssignments, CompactAssignmentsTo257, CompactAssignmentsTo265, CompactAssignmentsWith16, CompactAssignmentsWith24, CompactScore, CompactScoreCompact, ElectionCompute, ElectionPhase, ElectionResult, ElectionScore, ElectionSize, ElectionStatus, EraIndex, EraPoints, EraRewardPoints, EraRewards, Exposure, ExtendedBalance, Forcing, IndividualExposure, KeyType, MomentOf, Nominations, NominatorIndex, NominatorIndexCompact, OffchainAccuracy, OffchainAccuracyCompact, PhragmenScore, Points, RawSolution, RawSolutionTo265, RawSolutionWith16, RawSolutionWith24, ReadySolution, RewardDestination, RewardPoint, RoundSnapshot, SeatHolder, SignedSubmission, SignedSubmissionOf, SignedSubmissionTo276, SlashJournalEntry, SlashingSpans, SlashingSpansTo204, SolutionOrSnapshotSize, SolutionSupport, SolutionSupports, SpanIndex, SpanRecord, StakingLedger, StakingLedgerTo223, StakingLedgerTo240, SubmissionIndicesOf, Supports, UnappliedSlash, UnappliedSlashOther, UnlockChunk, ValidatorIndex, ValidatorIndexCompact, ValidatorPrefs, ValidatorPrefsTo145, ValidatorPrefsTo196, ValidatorPrefsWithBlocked, ValidatorPrefsWithCommission, VoteWeight, Voter } from '@polkadot/types/interfaces/staking';
 import type { ApiId, BlockTrace, BlockTraceEvent, BlockTraceEventData, BlockTraceSpan, KeyValueOption, MigrationStatusResult, ReadProof, RuntimeVersion, RuntimeVersionApi, RuntimeVersionPartial, SpecVersion, StorageChangeSet, TraceBlockResponse, TraceError } from '@polkadot/types/interfaces/state';
 import type { WeightToFeeCoefficient } from '@polkadot/types/interfaces/support';
-import type { AccountInfo, AccountInfoWithDualRefCount, AccountInfoWithProviders, AccountInfoWithRefCount, AccountInfoWithRefCountU8, AccountInfoWithTripleRefCount, ApplyExtrinsicResult, ArithmeticError, BlockLength, BlockWeights, ChainProperties, ChainType, ConsumedWeight, DigestOf, DispatchClass, DispatchError, DispatchErrorModule, DispatchErrorTo198, DispatchInfo, DispatchInfoTo190, DispatchInfoTo244, DispatchOutcome, DispatchResult, DispatchResultOf, DispatchResultTo198, Event, EventId, EventIndex, EventRecord, Health, InvalidTransaction, Key, LastRuntimeUpgradeInfo, NetworkState, NetworkStatePeerset, NetworkStatePeersetInfo, NodeRole, NotConnectedPeer, Peer, PeerEndpoint, PeerEndpointAddr, PeerInfo, PeerPing, PerDispatchClassU32, PerDispatchClassWeight, PerDispatchClassWeightsPerClass, Phase, RawOrigin, RefCount, RefCountTo259, SyncState, SystemOrigin, TokenError, TransactionValidityError, UnknownTransaction, WeightPerClass } from '@polkadot/types/interfaces/system';
+import type { AccountInfo, AccountInfoWithDualRefCount, AccountInfoWithProviders, AccountInfoWithRefCount, AccountInfoWithRefCountU8, AccountInfoWithTripleRefCount, ApplyExtrinsicResult, ArithmeticError, BlockLength, BlockWeights, ChainProperties, ChainType, ConsumedWeight, DigestOf, DispatchClass, DispatchError, DispatchErrorModule, DispatchErrorModuleU8a, DispatchErrorTo198, DispatchInfo, DispatchInfoTo190, DispatchInfoTo244, DispatchOutcome, DispatchResult, DispatchResultOf, DispatchResultTo198, Event, EventId, EventIndex, EventRecord, Health, InvalidTransaction, Key, LastRuntimeUpgradeInfo, NetworkState, NetworkStatePeerset, NetworkStatePeersetInfo, NodeRole, NotConnectedPeer, Peer, PeerEndpoint, PeerEndpointAddr, PeerInfo, PeerPing, PerDispatchClassU32, PerDispatchClassWeight, PerDispatchClassWeightsPerClass, Phase, RawOrigin, RefCount, RefCountTo259, SyncState, SystemOrigin, TokenError, TransactionValidityError, UnknownTransaction, WeightPerClass } from '@polkadot/types/interfaces/system';
 import type { Bounty, BountyIndex, BountyStatus, BountyStatusActive, BountyStatusCuratorProposed, BountyStatusPendingPayout, OpenTip, OpenTipFinderTo225, OpenTipTip, OpenTipTo225, TreasuryProposal } from '@polkadot/types/interfaces/treasury';
 import type { Multiplier } from '@polkadot/types/interfaces/txpayment';
 import type { ClassDetails, ClassId, ClassMetadata, DepositBalance, DepositBalanceOf, DestroyWitness, InstanceDetails, InstanceId, InstanceMetadata } from '@polkadot/types/interfaces/uniques';
@@ -307,6 +307,7 @@ declare module '@polkadot/types/types/registry' {
     DispatchClass: DispatchClass;
     DispatchError: DispatchError;
     DispatchErrorModule: DispatchErrorModule;
+    DispatchErrorModuleU8a: DispatchErrorModuleU8a;
     DispatchErrorTo198: DispatchErrorTo198;
     DispatchFeePayment: DispatchFeePayment;
     DispatchInfo: DispatchInfo;
diff --git a/packages/types-codec/src/types/registry.ts b/packages/types-codec/src/types/registry.ts
index f2d67f3b52..356045984c 100644
--- a/packages/types-codec/src/types/registry.ts
+++ b/packages/types-codec/src/types/registry.ts
@@ -60,7 +60,7 @@ export interface Registry {
   createdAtHash?: IU8a;
 
   findMetaCall (callIndex: Uint8Array): CallFunction;
-  findMetaError (errorIndex: Uint8Array | { error: BN, index: BN }): RegistryError;
+  findMetaError (errorIndex: Uint8Array | { error: BN, index: BN } | { error: BN | Uint8Array, index: BN }): RegistryError;
   findMetaEvent (eventIndex: Uint8Array): CodecClass<any>;
 
   isLookupType (value: string): boolean;
diff --git a/packages/types/src/create/registry.ts b/packages/types/src/create/registry.ts
index 3a5a5e3a05..49bbdeb92f 100644
--- a/packages/types/src/create/registry.ts
+++ b/packages/types/src/create/registry.ts
@@ -4,7 +4,7 @@
 import type { Codec, CodecClass, IU8a } from '@polkadot/types-codec/types';
 import type { CreateOptions, TypeDef } from '@polkadot/types-create/types';
 import type { ExtDef } from '../extrinsic/signedExtensions/types';
-import type { ChainProperties, DispatchErrorModule, EventMetadataLatest, Hash, MetadataLatest, SiField, SiLookupTypeId, SiVariant } from '../interfaces/types';
+import type { ChainProperties, DispatchErrorModule, DispatchErrorModuleU8a, EventMetadataLatest, Hash, MetadataLatest, SiField, SiLookupTypeId, SiVariant } from '../interfaces/types';
 import type { CallFunction, CodecHasher, Definitions, DetectCodec, RegisteredTypes, Registry, RegistryError, RegistryTypes } from '../types';
 
 import { DoNotConstruct, Json, Raw } from '@polkadot/types-codec';
@@ -288,10 +288,15 @@ export class TypeRegistry implements Registry {
   }
 
   // finds an error
-  public findMetaError (errorIndex: Uint8Array | DispatchErrorModule): RegistryError {
+  public findMetaError (errorIndex: Uint8Array | DispatchErrorModule | DispatchErrorModuleU8a): RegistryError {
     const [section, method] = isU8a(errorIndex)
       ? [errorIndex[0], errorIndex[1]]
-      : [errorIndex.index.toNumber(), errorIndex.error.toNumber()];
+      : [
+        errorIndex.index.toNumber(),
+        isU8a(errorIndex.error)
+          ? errorIndex.error[0]
+          : errorIndex.error.toNumber()
+      ];
 
     return assertReturn(
       this.#metadataErrors[`${section}`] && this.#metadataErrors[`${section}`][`${method}`],
diff --git a/packages/types/src/interfaces/system/definitions.ts b/packages/types/src/interfaces/system/definitions.ts
index 88650b3237..6b40702bb0 100644
--- a/packages/types/src/interfaces/system/definitions.ts
+++ b/packages/types/src/interfaces/system/definitions.ts
@@ -214,6 +214,10 @@ export default {
       index: 'u8',
       error: 'u8'
     },
+    DispatchErrorModuleU8a: {
+      index: 'u8',
+      error: '[u8; 4]'
+    },
     DispatchErrorTo198: {
       module: 'Option<u8>',
       error: 'u8'
diff --git a/packages/types/src/interfaces/system/types.ts b/packages/types/src/interfaces/system/types.ts
index ad25c8ddd9..59a41fba2e 100644
--- a/packages/types/src/interfaces/system/types.ts
+++ b/packages/types/src/interfaces/system/types.ts
@@ -125,6 +125,12 @@ export interface DispatchErrorModule extends Struct {
   readonly error: u8;
 }
 
+/** @name DispatchErrorModuleU8a */
+export interface DispatchErrorModuleU8a extends Struct {
+  readonly index: u8;
+  readonly error: U8aFixed;
+}
+
 /** @name DispatchErrorTo198 */
 export interface DispatchErrorTo198 extends Struct {
   readonly module: Option<u8>;
diff --git a/packages/types/src/metadata/decorate/errors/index.ts b/packages/types/src/metadata/decorate/errors/index.ts
index fb9335035c..0238da3a3f 100644
--- a/packages/types/src/metadata/decorate/errors/index.ts
+++ b/packages/types/src/metadata/decorate/errors/index.ts
@@ -3,11 +3,11 @@
 
 import type { Text, u8 } from '@polkadot/types-codec';
 import type { Registry } from '@polkadot/types-codec/types';
-import type { DispatchErrorModule, MetadataLatest, SiField, SiVariant } from '../../../interfaces';
+import type { DispatchErrorModule, DispatchErrorModuleU8a, MetadataLatest, SiField, SiVariant } from '../../../interfaces';
 import type { PortableRegistry } from '../../../metadata';
 import type { Errors, IsError } from '../types';
 
-import { lazyMethod, objectSpread, stringCamelCase } from '@polkadot/util';
+import { isU8a, lazyMethod, objectSpread, stringCamelCase } from '@polkadot/util';
 
 import { lazyVariants } from '../../../create/lazy';
 import { objectNameToString } from '../util';
@@ -39,9 +39,12 @@ export function decorateErrors (registry: Registry, { lookup, pallets }: Metadat
 
       lazyMethod(result, stringCamelCase(name), () =>
         lazyVariants(lookup, errors.unwrap(), objectNameToString, (variant: SiVariant): IsError => ({
-          is: ({ error, index }: DispatchErrorModule) =>
-            index.eq(sectionIndex) &&
-            error.eq(variant.index),
+          is: ({ error, index }: DispatchErrorModule | DispatchErrorModuleU8a) =>
+            index.eq(sectionIndex) && (
+              isU8a(error)
+                ? error[0] === variant.index.toNumber()
+                : error.eq(variant.index)
+            ),
           meta: registry.createTypeUnsafe('ErrorMetadataLatest', [variantToMeta(lookup, variant)])
         }))
       );
diff --git a/packages/types/src/metadata/decorate/types.ts b/packages/types/src/metadata/decorate/types.ts
index 2542de1969..834feaa852 100644
--- a/packages/types/src/metadata/decorate/types.ts
+++ b/packages/types/src/metadata/decorate/types.ts
@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import type { AnyTuple, Codec, Registry } from '@polkadot/types-codec/types';
-import type { DispatchErrorModule, ErrorMetadataLatest, EventMetadataLatest, PalletConstantMetadataLatest } from '../../interfaces';
+import type { DispatchErrorModule, DispatchErrorModuleU8a, ErrorMetadataLatest, EventMetadataLatest, PalletConstantMetadataLatest } from '../../interfaces';
 import type { StorageEntry } from '../../primitive/types';
 import type { CallFunction, IEvent } from '../../types';
 
@@ -13,7 +13,7 @@ export interface ConstantCodec extends Codec {
 export interface IsError {
   readonly meta: ErrorMetadataLatest;
 
-  is: (moduleError: DispatchErrorModule) => boolean;
+  is: (moduleError: DispatchErrorModule | DispatchErrorModuleU8a) => boolean;
 }
 
 export interface IsEvent <T extends AnyTuple> {
diff --git a/packages/types/src/types/augmentRegistry.ts b/packages/types/src/types/augmentRegistry.ts
index 71e5348073..3ad382dfe5 100644
--- a/packages/types/src/types/augmentRegistry.ts
+++ b/packages/types/src/types/augmentRegistry.ts
@@ -5,7 +5,6 @@ import '@polkadot/types-create/types/augmentRegistry';
 
 import type { Codec, CodecClass } from '@polkadot/types-codec/types';
 import type { TypeDef } from '@polkadot/types-create/types';
-import type { BN } from '@polkadot/util';
 import type { ExtDef } from '../extrinsic/signedExtensions/types';
 import type { MetadataLatest } from '../interfaces/metadata';
 import type { SiField, SiLookupTypeId } from '../interfaces/scaleInfo';
@@ -27,7 +26,6 @@ declare module '@polkadot/types-codec/types/registry' {
     readonly signedExtensions: string[];
 
     findMetaCall (callIndex: Uint8Array): CallFunctionExt;
-    findMetaError (errorIndex: Uint8Array | { error: BN, index: BN }): RegistryError;
 
     clearCache (): void