Hi @EsE We just rolled out a new browser extension the other day. This triggered some issues in certain cases. Please check Users are not showing up on the console - #4 by nijazse which sounds like what you are describing but also Browser extension v3.0.0 - data issues identified for users using passbolt since v1 which has a short list of links at the bottom to other possible issues.
Please feel free to post back if you still need help or if it resolves the problem for you.
Also, 2.13.5 is the most recent version so an update is needed.