Constant crash on entering map

Just got hit with "buffer underflow error" and "unknown object type serialized by server". After receiving these two errors upon loading up the game, I now cant load any of my maps. Just wasted over 80 chaos on juicing one map and now i crash each time i attempt to enter the map, losing my portals on each attempt. I cant load into the map at all without crashing instantly. Verified integrity of my files as well as cleared my caches, no idea how to fix this.

Also having the same exact issue!

I should note that i have tried the following;
- Turning off all apps such as Awakened POE Trade (Made no Difference)
- Restarting PC (Made no Difference)
- Checking File Integrity (Made no Difference)

I have been able to;
- port to any campaign areas
- Run a Unique map off Kiracs missions

I have tried 4 maps from tier 1 to 16 and all crash instantly.

Please send help LOL.

Crashing on maps as well.

same here. the only difference i have is only 1 character cant enter maps. entering maps on an alternative character works fine. even maps opened by crashing character.

wow yet another kick in the gut by poe this season so many issues and now this

might be time to put poe to bed

I did some investigation and it appears that it crashes on entering areas with monster level 65 or higher. I can access all areas below that. This is only occurring with one character.

Same issue as listed above, Only one character seems to be effected, Map will crash on loading, The lakes seem to work for me currently,

Adding to the list of those affected by this issue.
Some quick testing seems to confirm what FightingChicken says earlier in the thread: Zone\Monster level seems to be a factor, as I can load into The Ravaged Square (level 64) just fine, but attempting to go to any higher level zone from there - including maps from my Hideout or from the Epilogue Town using the Map Device - will result in an instant crash.
Initially was receiving the error message of: "unknown object type serialized by server", but now it's just an instant CTD.
Happening on all characters, base class does not seem to be a factor for me.

I've just encountered this error, however, it only effects 1 of my characters, ever another character has no crashing issues. I am able to move to some areas of the game and others crash.

tried reinstalling the game, rebooting pc/steam