Custom plugin drag and drop to modules not working, plugin panel unresponsive

nie dzia=C5=82a drag&drop w=C5=82asnych plugin=C3=B3w na modu=C5=82y, n= ie dzia=C5=82a tak=C5=BCe panel po klikni=C4=99ciu w sw=C3=B3j plugin

Imported from in-app feedback.