Installation on raspberry pi from apt fails

[murchu27]

Description

I'm following the "Debian/Ubuntu" section of the Self-Hosting guide for Jitsi Meet, to install Jitsi Meet on my Raspberry Pi 4. After having added the Jitsi package repository, and running apt-get install jitsi-meet, apt attempts to install jicofo as a dependency. This installation fails with an error.

Current behavior

When installing with apt, the installation fails with the following error:

...
Setting up jicofo (1.0-740-1) ...
Traceback (most recent call last):
	4: from <internal:gem_prelude>:2:in `<internal:gem_prelude>'
	3: from <internal:gem_prelude>:2:in `require'
	2: from /usr/lib/ruby/2.5.0/rubygems.rb:117:in `<top (required)>'
	1: from /usr/lib/ruby/2.5.0/rubygems.rb:1371:in `<module:Gem>'
/usr/lib/ruby/2.5.0/rubygems.rb:1371:in `require': /usr/lib/ruby/2.5.0/rubygems/specification.rb:157: syntax error, unexpected '=', expecting => (SyntaxError)
...   :signing_key               =� Nil,
...                              ^
/usr/lib/ruby/2.5.0/rubygems/specification.rb:157: invalid multibyte char (UTF-8)
dpkg: error processing package jicofo (--configure):
 installed jicofo package post-installation script subprocess returned error exit status 1
...
dpkg: dependency problems prevent configuration of jitsi-meet:
 jitsi-meet depends on jicofo (= 1.0-740-1); however:
  Package jicofo is not configured yet.

Expected Behavior

jicofo, and then jitsi-meet, installs successfully.

Steps to reproduce

Follow the Self-Hosting guide (Debian/Ubuntu) to install jitsi-meet on Raspbian 10 (buster) on a Raspberry Pi 4.