Best,
I get the following error '500: Internal Server Error Call to a member function getNodeAsArray() on null'
-when opening a survey.
-if I want to add a question (if I get into the poll)

Last week there was no problem at all. I changed nothing.
What can I do? I'm the main administrator.

Thank you!

First of all, it would be good to mention which version of LS you are running.

What happened between last week and this week?
- Limesurvey Update?
- Server update?

Usually a software does not just change and those errors don't just appear out of no where. So it would be good to determine where this might be coming from.

You remove some QuestionTheme ?

I have this issue (in develop) when i remove some questionTheme

Must test in 5.X
Can you go to your Question Theme admin ?

I know:
* custom survey themes (2) were added
* custom question theme was added

I did this for this user. I have permissions to delete themes, but I have unsufficient permissions to delete the question theme.

I also cannot open existing surveys and add or delete questions.

LimeSurvey Cloud
Version 5.2.2
Ticket has been submitted

@tammo : i ghave this issue when testing develop with github.com/LimeSurvey/LimeSurvey/pull/2064 and revert after.
I can just hide it,
But i have same issue

When i talk from deletion : i think of FTP/SSH deletion. Didn't know it was on LS cloud.