Thank you, @nebulon!!!

I was unable to find any official documentation showing a breaking API change. However I did find this python library that seemed to be on top of its game: Citric. Their "save_responses"/"export_responses" method still worked, so as a temporary measure I was able to drop in their method to get data flow working again. I haven't dug into their code further yet to see what specifically changed/broke, but I'm going to mark this thread as resolved (before I lose it), as someone can read that code to find the specific solution if needed.

@imc67 Thanks! That solved it. The secret was finding that "Question Summary" button!

@imc67 looks like they haven't pushed a tag for 5.4.3 to the repo yet: https://github.com/LimeSurvey/LimeSurvey/tags

@loudlemur the app is pre-setup with a username/password for admin. The default username is admin and password is changeme

@nebulon Thank you for your response. I checked database integrity in LS and deleted old surveys. After this operation, update run smoothly in Cloudron ... thank you!

@nebulon Hi Johannes, I have just updated to the latest version of LS and it seems to be OK. Thank you very much for your help. I have learnt how to use backups and my takeaway is that it would be better to update manually (and backup first). All the best, Martin

Never mind it seems their login form has a shorter text limit than LimeSurveys maximum character limit. For some reason they decided to have a character limit on the form and not the password requirements. 10/10 good software

hm.. I can also not reproduce it. Yes, that login url I did get as well, but when then forwarded to the logged in view (the one with index.php?r=admin) it did fail before.

@d19dotca Thank you, next time I will post in the right category @girish I just gave it a test and it works like a charm! Thank you very much