I asked the modder of our community about this and he told me this:
"I dont think those warnings are related to your issue. I mean they only impact how items are displayed but should have no relation to downloading a mapRegarding the issue itself, if i had to guess I would say its definitely a problem with wse client, because if server had issues, non-wse users would have run into them as well but there are no complaints of that. And it wouldn't be the first time wse would introduce bugs to core mechanics, i also remember npc17 investigating economy system that was somehow messed up by wse".
No idea if this helps with anything but it's worth trying.