Hi,
Roles are exported by User Role Editor into zipped .json file, not PDF one.
Restore corrupted role capabilities list granting them manually again. Backup role by exporting them. It will allow to restore missed role back at any moment. Monitor which action/change/update may lead to this result. Report the issue if you can repeat it. I’m ready to investigate the reasons and develop a fix if any bug or incompatibility will be discovered
