Hello,
The structure of the htaccess is the one generated during the WordPress installation, with the addition of the changes made by some plugins when they were installed.
The problem with Backuply was resolved after fixing an issue with the resolution of internal DNS.
We were able to access the site and BackOffice from any network and do everything without any limitations in the BackOffice, only Backuply could not perform backups or restores, with the backup stopping at 17% and the restore at 10%, as I mentioned earlier.
After IT fixed the internal DNS, Backuply started working without any problems.