In that case, is it possible for you to check again after disabling your other plugins? The problem should not be caused when the other plugins are disabled. Then re-enable them one by one to find out which one causes the problem. Once you do, let me know and I will test with that plugin on my end and fix any problem.
Additionally, can you check your .htaccess file, if you are using the apache server? The recommended settings are here: https://codex.wordpress.org/htaccess If your .htaccess file differs from the one recommended, can you send it to me?
please let me know what you find
thank you