We are having this issue as well. However, I restarted the PMPC service yesterday then kicked off a sync and saw a number of applications successfully published. But this morning, the e-mail report showed that Chrome published an update but didn't include any applications updated. Checking the PatchMyPC.log file shows the same errors we were having yesterday (including in OP post).
So had the described problem, restarted PMPC service, problem resolved... for a while. Then problem resurfaced today.
So had the described problem, restarted PMPC service, problem resolved... for a while. Then problem resurfaced today.