FOP2 no longer working, Need HELP!

We purchased a registration code for FOP2 which was working for a while but one day we restarted the asterisk FreePBX server and it no longer works.

After signing into the FOP it says: Validation problem. Please contact your provider.
I tried to run fop2_server but I get another error stating “fop2_server: command not found”.

I performed -ls and I see the fop2_server highlighted in green but yet it will not run the command at all.

Can anyone assist me with this please? Thanks!!