Error message after new installation: “Query _folder: Cannot modify a read-only asset.”

I recently upgraded from Biblioscape version 8 to 9. The database converted successfully but when I open Biblioscape I get the following error message:

“Query _folder: Cannot modify a read-only asset.”

If go to SEARCH --> LOOKUP --> KEYWORD I get the same error message. I also get the same message if I try to create a new reference. After this, all items in the project tab can’t be selected.

How can I resolve this problem? Thank you for your help.

It is possible the files are

It is possible the files are set as read only accidentally by users. You can zip all the files under your database folder and email me the zip. I will take a look.