I think this has more to do with the instance than it does with wefwef. I was running into the same array of errors, so I accessed the instance via the lemmy.world web page and found all the same sorts of errors there.
I know they did and it's upgrade recently, and it went well. But in the release/deployment notes they said the instance was slow and using up a lot of CPU. This probably has a lot more to do with the instance getting slammed from all the reddit refugees than anything else. But either way, it sounds like the instance is getting hit very hard.