Hi, George, and welcome to the UTM Community!
That looks like part of a line from the Web Filtering log. If that's the case, please post this question in the Web Protection forum and include the complete line from the log file.
Cheers - Bob
I asked George to ask this question in the Web Protection forum. In fact, once I saw the entire line from the log, it was clear that changing the timeout wasn't going to help. I answered his question in the Web Protection forum.
Cheers - Bob