Recommended way to install Collabora? (tried built in, getting errors[more info below])

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Nextcloud version (eg, 18.0.2): 19.0.1snap3
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04.1
Apache or nginx version (eg, Apache 2.4.25): N/A(Caddy v2.1.1)
PHP version (eg, 7.1): Not Sure

The issue you are facing:
Trying to find a good way to set up Collabora Online for my personal Nextcloud instance. It says “Collabora Online server is reachable.” in settings, but when I try to open a document it gives the “Connection to server lost” error.

Is this the first time you’ve seen this error? (Y/N): Yes

Steps to replicate it:

  1. N/A
  2. N/A
  3. N/A

The output of your Nextcloud log in Admin > Logging:


The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

No convenient way to paste, will add if requested

The output of your Apache/nginx/system log in /var/log/____:

N/A, will add if requested