First of all, try to check the status of the service via the command line using the following (based on the service you are using: Imunify360 or ImunifyAV(+)):
| Imunify360 | ImunifyAV(+) | 
# service imunify360 status | 
 # service imunify-antivirus status | 
In case the issue is still the same after 60 minutes, you can try creating the backup of the Imunify files and do the service restart to force the sync process:
| 
 Imunify360  | 
# service imunify360 stop  | 
