After a scan with ImunifyAV+, some files have been removed from the site or replaced with 0-byte files.
ImunifyAV+, by default, will replace files detected as malware. This change happens immediately after upgrading the ImunifyAV free version to the ImunifyAV+ version.
Restore the files from the ImunifyAV+ files tab. You can find additional details in the below article:
How to restore original files with ImunifyAV
The ImunifyAV+ documentation has additional details about configuring the malware cleanup to remove files automatically.