matrix messages get stuck [BUG]

[jdohm]

Describe the bug
If i write a support request, the message never arrives in the matrix group.
The popup shows that the message got send however.

This is an issue with the login function of the matrix-js-sdk. If the login fails, there is no retry at the moment. As a result all following actions on matrix will fail as well.
To solve this issue, a failed matrix login on the server needs to get detected and resolved.

To Reproduce
Steps to reproduce the behavior:

1. restart the nodejs server until the log shows a failed matrix login
2. send report request on web ui
3. see error