This module currently doesn't work with CKeditor 5. As soon as you activate the checkbox for the filter in a text format, the following error message appears: "CKEditor 5 only works with HTML-based text formats. The "Simple oEmbed filter" (filter_soembed) filter implies this text format is not HTML anymore."
Fixed
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Made a fix for this. You should be able to see the fix in the latest release (2.x branch).