Unresponsive UI on first load on single user mode

[dadmobile]

I've found that after setting up a server initially there is a 5s delay on first load where it appears the app isn't working. This is because the app fails to fetch the experiment list and then waits 5 seconds before trying again.

Here is the network tab in my browser. The first call to get experiments returns a 401, which triggers a login. But the retry that happens immediately after that login fails with HTTP 400 with the error shown on the right:

Here is a video of what this looks like for a user:
https://github.com/user-attachments/assets/33813c49-6ebf-4652-bb8d-24ea211e95b1