Ref: CODE Documentation
The environment variables have been modified with the versions above or equal to 21.11.3.6
What was previously used to specify the nextcloud server
-e "domain=my_nice_domain\\.with_dot_escaped\\.org"
does not exist any more (probably because it has been implemented, that several document origins might be used for one collabora_host).
Therefore, replace it with:
-e "aliasgroup1=https://my_nice_domain\\.with_dot_escaped\\.org:443"
HINT: the port number (here 443) was not present with the “domain=” previous format. It was given in the linked documentation, so I reproduced it with the port number. No idea if a missing port number can broke again the configuration. (Did not test and won’t, because it works as expected when explicitly provided)
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I assume that if you are here, it is because you have an easy configuration with a one(collabora)-to-one(nextcloud) constellation. If not, got seek about collabora and this new aliasgroup1 concept…