I used UpdraftPlus to migrate a site today and found that OSE Firewall is incompatible with the migration process it uses. I'm guessing it's because of some database entries in the WP database, or the lack of transportability of the OSE databases if the WordPress Address or Site Address is changed (as they were on this migration). I deleted the plugin and tried re-installing but there must be some remnants (in the WP database?) that are not removed when deleting the plug-in.
The symptom is that the site shows a blank page, as if the firewall is preventing any html presentation to the browser. No 404 and no error message, just a blank page.
I can't use your product on this site now until I can identify what needs to be changed to allow OSE to function normally.
Do you have any idea what I might try?
Shoot me an email and I can reply with a copy of the restore log showing errors that were associated with OSE tables.
Thanks in advance!