Backwards Navigation from Empty Folder in Media Picker results in error and locked editor

[Alkaersig]

Which Umbraco version are you using?

13.12.0

Bug summary

After upgrading to 13.12.0 we started getting reports from customers that their Media Pickers was locking up and throwing an error:
Request error: The URL returned a 404 (not found): /umbraco/backoffice/umbracoapi/entity/GetPagedChildren

At the same time this error can be seen in the console where -1 is the Id of the parent node you navigate to:

Specifics

No response

Steps to reproduce

After some thorough testing i isolated the error to navigating to a empty folder followed by backwards navigation to any parent folder. This will trigger the error and lock the editor from any further navigation (you have to close the editor and open it again to be able to navigate again).

I tested it on multiple environment that we upgraded to 13.12.0 and i can replicate it on all of them. Also tested on an environment on 13.8.x that does not have the error. But since we are seeing it now, i am pretty sure it was introduced in 13.12.0.

Expected result / actual result

No response

[github-actions]

Hi there @Alkaersig!

Firstly, a big thank you for raising this issue. Every piece of feedback we receive helps us to make Umbraco better.

We really appreciate your patience while we wait for our team to have a look at this but we wanted to let you know that we see this and share with you the plan for what comes next.

• We'll assess whether this issue relates to something that has already been fixed in a later version of the release that it has been raised for.
• If it's a bug, is it related to a release that we are actively supporting or is it related to a release that's in the end-of-life or security-only phase?
• We'll replicate the issue to ensure that the problem is as described.
• We'll decide whether the behavior is an issue or if the behavior is intended.

We wish we could work with everyone directly and assess your issue immediately but we're in the fortunate position of having lots of contributions to work with and only a few humans who are able to do it. We are making progress though and in the meantime, we will keep you in the loop and let you know when we have any questions.

Thanks, from your friendly Umbraco GitHub bot 🤖 🙂

[AndyButland]

Thanks for reporting @Alkaersig. Yes, this does look like a regression, coming from #20202.

I've replicate the issue and prepared a fix in #20987

[leekelleher]

Fixed in #20987, for Umbraco v13.13.0.