Today a client contacted use with the following problem.
Whenever they go to the plugins section in FileMaker Pro, they get an error message and the plugins are greyed out:
and after clicking OK button:
They asked for help, so we checked. Turns out they used assisted install with the option AI_DISABLEPLUGINS=1 in the configuration file. Please use AI_DISABLEPLUGINS=0 if you plan to use plugins like the MBS FileMaker Plugin.