Wich Antivirus software are you using?
Turn off while you are playing; Antivirus Firewall or add Secrets of Grindea to the "whitelist"
Who is the Host? (Guess your friend?) Had you tried to switch between you and your mate?
I think in this case, it has something to do with your...
Windows Up to date?
All hardware drivers Up to date?
If you are able to answer all questions above with yes. Try this:
Deinstall: "Microsoft XNA Framework Redistributable 4.0"
Install "CCleaner" (URL: https://www.piriform.com/ccleaner)
Run Cleaner & Registry error finder...
situation: One friend and I grinding for one card.
I got the first drop, "picked" the card. To the question.
After I got the card, is it still possilbe that mobs wich I kill drop one card?
Is it possible that I pick it up by mistake?
No Screenshot and sorry for my bad english.
The first time you ever fish while your exam in story mode.
After the fishing with 4 players, we all 4 had the message "waiting for other player",
but all were finished with the quest. No one could move or do anything.
Only I got a message from NPC...