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I have been using this plugin for years, and on the front end everything works perfectly (thank you).
However in the last few days, on the back end, any attempt to change a setting or field results in a 403 error.
I have turned off all plugins, checked permissions on files (644), folders (755) etc, .htcaccess (644 and writing from the Admin dashboard) – all looks good and literally everything works except backend changes.
Our host uses litespeed for information, but I have purged all caches etc – nothing seems to work.
Any help welcome as I need to edit some fields – thank you