The hotfix (S4MP 0.2.1) is here which contains fixes for the breaking changes which were introduced in the latest patch for the game (released on 08/08/2019). The download is available from the S4MP website or ModTheSims: http://modthesims.info/d/629316/
(and also don’t forget that S4MP Patreon has just kicked off at https://www.patreon.com/simsmultiplayer Early access to new features, online version and many more!)