Access to the path 'Assets/Ferr/2D/Scripts/poly2tr

Hi,
That file is not part of the plugin, so I'm guessing its one of yours. Did you add it to the LanguageSource's references (under the assets table)?

Without a bit more of context around the error, its not much I can do. Can you please, send me the callstack of that error?
When the error its printed in the console, bellow it, it will show a callstack showing which function produced it. That way I will be able to know what the plugin was trying to do when the error happened.

The only other thing I can think of its that the plugin its trying to parse the scripts when parsing the scene. If thats the problem, a temporal fix is to open the I2Languages.prefab and then in the Tools tab, under Parse Scenes, uncheck the Scripts toggle. That way scripts will be ignored when parsing.
Nonetheless, as soon as I get back today I will try making some scripts read-only to see if I get to reproduce the issue and issue a propper fix.

Hope that helps,
Frank