Menu Items on the Easy Blogging

Good Day

We have recently moved from a shared server to a dedicated virtual server on one of our sites. It is a multi site. But after the move the menu items on the Easy blogging Plugin won't allow me to upload a icon. And I can not remove previous menu items. So the icon upload and the remove button just doesn't do anything.

Is there maybe a solution for this. It worked perfectly when we installed it the first time on the shared server. I have tried deleting the plugin and reinstalling it, but to no success.

Please help
Regards