FSM client server and client do not have the same version getting inside the FSM client.

@shaludroid

Has an update been done recently? does the message look like the screen shot below.

Go into help/about/details to see the specific information does it look like the screen shot below note the red boxes? 

If you do find different verison information, then you will need to update the one that is older.

Regards,

Morris

@shaludroid most likely a FSM Update was installed recently and the Smart Client you are using was not updated. Make sure upon installing the Update to select the Smart Clients in use on following screen to get them updated as well:
 

Best regards
Roman