I encountered a similar error. Not sure if this will solve your problem, but this is the fix for mine.

In Glue you have to attach connections in the "Job Detail". By default Glue will use the subnet of the first connection in that list. If you have multiple connections with different subnets, you may get an error if you try to load data using a connection that doesn't share the subnet with the first connection (in the list of connections).

I re-ordered my connections in the "Job Detail" and it fixes the issue.