bug: 🐛 Group chats are broken

[highesttt]

Bug Report: Group chats

Describe the bug

• Group chat messages aren't decrypted
• Messages cannot be sent
• Group chat & user names aren't shown correctly

To Reproduce

Steps to reproduce the behavior:

1. Create a groupchat
2. Invite 2 users
3. Send a message

Expected behavior

Messages should work

Screenshots or logs

Additional context

n/a