message: Prevent error being thrown so that we can throw our own better one
diff: @@ -211,7 +211,7 @@ export class Algorithm extends EventEmitter {
  }
  // When we do have a room though, we expect to be able to find it
  - let tag = this.roomIdsToTags[val.roomId][0];
  + let tag = this.roomIdsToTags[val.roomId]?.[0];
  if (!tag) throw new Error(`${val.roomId} does not belong to a tag and cannot be sticky`);
  // We specifically do NOT use the ordered rooms set as it contains the sticky room, which
  