There is something wrong in the configuration of the path of the files provided to mcc.
It looks like your call results in trying to add "brain2mesh-master\plugin.mat" which indeed doesn't exist.
Put a breakpoint at line 194 to check that the plugin brain2mesh is correctly loaded.
It should add:
-a "C:\Users\franc\.brainstorm\plugins\brain2mesh\brain2mesh-master"
-a "C:\Users\franc\.brainstorm\plugins\brain2mesh\plugin.mat"
If you have issues compiling Brainstorm with the plugins, then compile it without.
Make sure you clean your Matlab path before running brainstorm compile: it should contain only the Matlab installation folders.