test: replace console error with warning to fix automation case

[PatrykBuniX]

Description

When we cannot find the user id of 1:1 conversation, log a warning in a console instead of an error. (This should remove unexpected error statement from one automation scenario).

Checklist

• PR has been self reviewed by the author;
• Hard-to-understand areas of the code have been commented;
• If it is a core feature, unit tests have been added;