I didnt realise it was 3rd party code that you were looking at, in which case I would contact the 3rd party, rather than making a change, as it could invalidate any support contract you have.

As you have the message

"The transaction log for database 'tempdb' is full. To find out why the apace in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases."

Have you also got a restriction on the TempDB log file as this should grow to fill the remaining 21.5Gb of free space, if you have remove the restriction or set it to 10GB (10,000 mb) to see if that helps the query run through.