Game tends to crash a lot when launching multiplayer world

[Eughstein]

It just closes game entirely without any notifications instantly, server logs only have this:

when launching game again there isn't any notification about possible mod problem or something
and when it does work it also instantly crashes when i try to place a wall...?
same thing, no notification about any code problem but now with this in client logs

"[00:07:48]: [CRITICAL] Failed to save file: APP:Klei//DoNotStarveTogetherBetaBranch/918464748/client_save/session/04BE57F700720C15/KU_KHy4Irw9_/knownfoods_data
[00:07:48]: [CRITICAL] Fingerprint:hbrjimvnqldgdfflhhoqabgirgnnokeiggjlnjijkdrjlhvnijdgpdflujoqbdgiefnnojeipejlviijbdrjehvnijdgjdfltmoqodgihfnnijeiddjltmijlhrjofvntkdgmgfltioqbcgiqinnjkeildjlghijcerjphvnildgnefllioqabgipgnnvjeipdjlghijgbrjphvnijdgheflgkoqhcgisfnntjeindjlqiijlhrjlmvnnndgohflmloqdggipknnkoeioijlqlijlhrjrhvnqkdgpeflnioqlbgipgnnsmeinejljiijcerjphvntodgjdflnioqgcgiqgnnujeijdjlsiijlhrjsmvnindgigflnkoqaggimknnlleirijlilijeirjnmvnondgghflhkoqeggioknnsneiffjlnjijlcrjjfvnumdgpdflmloqmdgirgnnkkeidijltjijlhrjjhvnskdgnefllhoqlbginfnnsjeijdjlmiijherjfgvnikdgheflmhoqebgi.
[00:07:48]: Serializing user: session/04BE57F700720C15/A7IH3S24MNK9/0000000001
[00:07:59]: Assert failure 'false && "Invalid shape type!"' at ..\source\game\components\PhysicsComponent.cpp(600): Trace follows..."

any idea what could cause it?

[ShadowDuelist]

The “failed to save file” part of the error makes me wonder if it could be related to this. I’d try this first (unless a dev says otherwise of course)
 

https://support.klei.com/hc/en-us/articles/360029882171-Getting-a-Unable-to-write-to-files-in-the-config-directory-Error-Message