Settings page never fully loads

Using the free version of Multicollab v5.2 with WordPress 6.9, I'm getting a 500 error message in the browser console when accessing the Multicollab settings page – it begins to load, but forever shows the loading indicator:

<img width="1708" height="841" alt="Image" src="https://github.com/user-attachments/assets/4293efc3-19ad-4ea1-8e77-1a4fb2f52f2b" />