Friendica 3.5.1 has been released some days ago. There is currently a bug when retrieving conversations. I am currently working on a bufix and will release it in the next days.
Another issue arise with the new module for displaying of profile data: the server returns a BadRequestException error message. I have identified the issue and now I am checking how quickly we can provide the bugfix in Friendica 3.5.1 (into master branch of github).