Not able to use evaluate expression inside Android Studio

When I try to write an expression, as soon as press any key, getting error "File is not writable". Snapshot of error

I have a custom plugin, whose job is to edit depo file as soon someone tries to write something and do some other stuffs like adding file to change list etc.

After disabling this plugin, evaluate expression is working fine. Didn't have any clue what file access issue is caused by the plugin. Please help