Getting a bunch of Internal Server errors, and deleting item from dropdown is not working

Hey all,
On July 5th, an app that we have created for internal use has suddenly started giving out internal server errors when guest users try to access it. This seems to have resolved itself, but now we are facing another issue.
The delete items from dropdown has all of a sudden stopped working. What could the reasons for this be?
We were passing an empty value in the mutation previously, and it has worked well before.
We have also tried passing the following: “”, json “{}” and “{“ids”:}”, and none of these seem to be working as well.
Any help is appreciated.