This type of error “usually” indicates some type of server-side issue when connecting to the clusters.
These events are transient and rerun can solve the problem. But you can also check with us here! Have you tried a rerun yet? If not, please try that first.
Your job seems to be in the range we can process .. but assembly is a bit more complicated than the overall data size. The read content matters just as much. If you haven’t run any QA on the reads yet, backing up and doing that would be a good place to proceed after the rerun. You’ll be checking to eliminate technical issues, then deciding to apply items like read quality trimming.
Then, for a persistent error, you are welcome to share back your history for more specific feedback.
There are not any known issues at the UseGalaxy.org server (now, or from the last few days). But if you can share an example, we can look into the administrative details closer to confirm, then help to solve any outstanding usage/data issues.
Please let us know what happens! 