I would strongly prefer to NOT reinstall the game again, as that would mean another week of downloading T_T

I hate you forever.I would strongly prefer to NOT reinstall the game again, as that would mean another week of downloading T_T
I most often see this error happening when anti-virus (or other security software) mistakes the patcher for a virus and blocks part of it.
You could try re-applying the last few patches (see the link in my signature) but I doubt that will fix it.
I think you will have to re-install.
Either way, when installing or patching RoM, please temporarily disable your security softwares. Just remember to re-enable them afterwards.
I hate you forever.

Didn't think the game actually updated textures for places like silverspring through the years =\
will I have to completely reinstall it from scratch or is there an easier way to do that?
12gb of data is gonna take forever to download T_T... think it might just be easier to accept the screwy landscape..

that may be but can it corrupt more data/screw with other stuff like visuals of monsters/effects?i've had same exact problem for months now...not worth a reinstall, as it does not in any way impact gameplay...also, i've found it loads textures faster this way tbh, and reduces lag...
More importantly, your backpack is full...you should take care of that.