First run crash due to the certificate

[vankomerzhic24]

You will need to configure Mumble client to use the lowest possible latency.
We will start Mumble now. Please complete setup wizard and go to settings to increase quality and decrease latency.
Also, mute your microphone (if you have one) in Mumble.
Then exit Mumble.
Starting Mumble server (murmurd)...
Starting Mumble client (a window should appear in a moment)...
Changing PulseAudio configuration...
Adding sink...
Connection failure: Connection refused
pa_context_connect() failed: Connection refused

Apparently, it didn't start working until I agreed with the certificate

[vankomerzhic24]

Turns out, the same problem occurs not only on the first run. I re-downloaded the script to make sure.

First and third runs' output:

Starting Mumble server (murmurd)...
Starting Mumble client (a window should appear in a moment)...
SQL Prepare Error [CREATE TABLE IF NOT EXISTS `meta` (`keystring` TEXT PRIMARY KEY, `value` TEXT)]: database is locked Unable to execute statement
Changing PulseAudio configuration...
Adding sink...
Connection failure: Connection refused
pa_context_connect() failed: Connection refused

Second:

Starting Mumble server (murmurd)...
Starting Mumble client (a window should appear in a moment)...
Changing PulseAudio configuration...
Adding sink...
Connection failure: Connection refused
pa_context_connect() failed: Connection refused