Hi,

I am receiving these errors on the error_log of cups when trying to print. Every now and then the printer works but after the queue is empty, the error reappears and users are unable to print again. Cups server is on SLES 11 SP2

E [12/Oct/2016:13:25:42 +0800] Print-Job: Unauthorized
E [12/Oct/2016:13:25:42 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:42 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:42 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:42 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:42 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:42 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:43 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:43 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:43 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:43 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:43 +0800] cupsdAuthorize: Local authentication certificate not found!
E [12/Oct/2016:13:25:43 +0800] cupsdAuthorize: Local authentication certificate not found!