Hi, I try to use the web UI locally but I always get redirected to

<http://universal.prefect.io|universal.prefect.io>

. Does anyone know what's the problem ? Thanks. ps: I've already cleared my cookies (and tried with Chrome incognito mode). ps: I'm using the Docker image

"prefecthq/ui:2021-04-23"

Hi @flavienbwk - I’m taking a look at this for you. Can I check that when you say “use the web UI locally” you are running ‘prefect server start’?

Hi @Jenny. Thanks. No I have needs to start my instance without

prefect server start

. So I am using my own compose configuration : https://pastebin.com/PBnmHJLa

Hi @flavienbwk - from what you've sent I'm not sure how but it looks like your VUE_APP_BACKEND environment variable is somehow set to CLOUD. Can you set VUE_APP_BACKEND=SERVER and see if that fixes it? Thanks for raising this - it's highlighted that the fix we put in place for toggling between Cloud and Server still needs some work.

@Jenny if this is to be set for the

ui

container, the same problem occurs with or without 😕

Thanks for the update @flavienbwk - looking into this a bit further. Two more questions - do you ever see the cloud login screen or is it always the 400 error one? What uri are you using for your ui?

No. I get login screen only when clicking on "go to homepage"

Thanks.

For the other question : I use

<http://localhost:8081>

as URI for the UI

Ah - if it's ok for you, using an older version would be one way around it. Looks like this is an issue that was created when we made some updates to our auth in Cloud and the UI struggles with the non-standard URI (i.e. it's not localhost: 8080). I'll create a ticket for us to find a more long-term solution.

Since today we’re seeing the same error. We are running prefect in kubernetes (with the helm chart). Interestingly we haven’t touched anything, no updates, no new registrations - it happend out of the blue this morning.

Thanks @Joël Luijmes - this was a useful update!