message: Null guard around the matrixClient in SpaceStore
diff: @@ -818,7 +818,7 @@ export class SpaceStoreClass extends AsyncStoreWithClient<IState> {
  }
  protected async onAction(payload: ActionPayload) {
  - if (!spacesEnabled) return;
  + if (!spacesEnabled || !this.matrixClient) return;
  switch (payload.action) {
  case "view_room": {
  // Don't auto-switch rooms when reacting to a context-switch
  