Job Validation errors

Problem:

I get a message that says "Could not establish connection with SERVERNAME
Job can not be validated". FRPis installed and licensed on the serves.

---

Solution:

The same version of FRP should be installed on all the servers in the system. Mismatched versions may cause the servers to appear offline in the Server Overview window and attempting to add a job may produce a job validation error.

This error may also be caused when attempting to establish communications with a remote server. Goto the Add Job Advanced screen and select either the source or destination machine as the job initiator. If selecting the source machine still produces the error then try changing the initiator to the destination machine.