In my case, I’ve been able to fix this issue by checking the chrome console.
The XSS Auditor refused to execute a script in xxxxxxxxxxx/wp-admin/admin.php?page=XXX-theme-settings because its source code was found within the request. The auditor was enabled as the server did not send an 'X-XSS-Protection' header.
I’m wondering if there is some kind of workaround for this?
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