Improve typing (#9474)

src/components/structures/MatrixChat.tsx

@@ -24,7 +24,6 @@ import {
     MatrixEventEvent,
 } from 'matrix-js-sdk/src/matrix';
 import { ISyncStateData, SyncState } from 'matrix-js-sdk/src/sync';
-import { MatrixError } from 'matrix-js-sdk/src/http-api';
 import { InvalidStoreError } from "matrix-js-sdk/src/errors";
 import { MatrixEvent } from "matrix-js-sdk/src/models/event";
 import { defer, IDeferred, QueryDict } from "matrix-js-sdk/src/utils";
@@ -203,7 +202,7 @@ interface IState {
     // When showing Modal dialogs we need to set aria-hidden on the root app element
     // and disable it when there are no dialogs
     hideToSRUsers: boolean;
-    syncError?: MatrixError;
+    syncError?: Error;
     resizeNotifier: ResizeNotifier;
     serverConfig?: ValidatedServerConfig;
     ready: boolean;
@@ -1457,7 +1456,7 @@ export default class MatrixChat extends React.PureComponent<IProps, IState> {
                 if (data.error instanceof InvalidStoreError) {
                     Lifecycle.handleInvalidStoreError(data.error);
                 }
-                this.setState({ syncError: data.error || {} as MatrixError });
+                this.setState({ syncError: data.error });
             } else if (this.state.syncError) {
                 this.setState({ syncError: null });
             }