Inviting into a public space leads to crashing

### Steps to reproduce

1. Go to a room
2. type /invite @florian:domain.de
3. App crashes

### What happened?

### What did you expect?
That the Person shoud invited to room
### What happened?
APP crash

### Your phone model

Xiaomi mi 8

### Operating system version

Android 11

### Application version and app store

1.2.0 [40102002] (G-b3043)

### Homeserver

matrix.thekillertoxin.de

### Have you submitted a rageshake?

No