Adding new dropdown not working

Hi after I added a list items on a dropdown, I can’t manually add or create new dropdown in studio. It says it was successfully added but when I check the new dropdown it was missing, and also when I add new list item on a existing dropdown, it says it was successful but doesn’t. I tried the quick build and repair on the admin side. Please help.

Please check your permissions for custom/include/language and custom/Extension/application/Ext/Language Folders.