... Lang app required ... should not be...
Limitations: Creating new accounts in Hubzilla is not supported through socialauth sign-in
404 Not Foundnginx
you should find OAuth2 under https://realtime.fyi/apps
but I am not allowed (no import image button) to publish images here...
Unknown or expired ID
According to https://zapalot.in-eu.net/display/b64.aHR0cHM6Ly96YXBhbG90LmluLWV1Lm5ldC9pdGVtLzBiOGY1MzgzLWIwYzMtNGJhYS04ZDVmLTZkYmUxOGFmMDY1ZA the recipients email addresses are prechecked wrong. Adhoc repair in Zotlabs/Module/Invite.php line#132
The issues on #Hubzilla seem to be fixed by @Mario Vavti Vavti. Thanks!
PubCrawl -An unapologetically non-compliant ActivityPub Protocol implemention
Connexions works for me (some details wont, but it's not the point here).
Not sure how a link to my Hubzilla instance appears in your answer to astabski's question (is there some variable you can put in posts that displays differently depending on the intance from which one reads?)