Sorry for not being able to submit reprex. Just saw this message in my project:
Session version 1.2.1206-2 does not match server version 1.2.1153-1 - this is an unsupported configuration, and you may experience unexpected issues as a result.
We just pushed out the latest preview version of RStudio Server Pro, and despite the scary message, all should be fine. If you find otherwise please let us know.