I have completed the Lightning Process builder step and i have verified that it is working correctly ( the battle Station record has been changed to complete and it has post a message to chatter, but when I click the Verify Step button I get this error message:

"Step Not yet complete... here's what's wrong:
An update to a Battle Station record with Weapon Status of 'Fully Operational' failed to post a Chatter message to the record. Make sure that the process is configured correctly and that it is activated.
Note: you may run into errors if you've skipped previous steps."