[BUG] Seeing a blank page for local development

[NuDheeraj]

Describe the bug
The app fails to load on main branch

To Reproduce
Steps to reproduce the behavior:

1. Follow the Self-hosted: Manual Setup
2. Create a new user in the login page
3. automatically get redirected to link
4. See error in frontend console logs

Expected behavior
Able to open the workspace properly

Screenshots

Briefly I see this:

then browser gets blank and stuck:

Additional context

Added frontend and backend logs

is there a stable tag or branch to follow?

frontend_logs.log

backend_logs.log

[NuDheeraj]

I switched to tag v0.4.23 same issue cc: @waleedlatif1 @icecrasher321, seeing the same recursive button error The above error occurred in the <button> component. It was handled by the <ErrorBoundary> error boundary., also I see basic requirements like zustand missing in package.json, is there some other branch I should use?

[elviromercic23-cmyk]

Wauuu sub, 25. lis 2025. 04:13 NuDheeraj ***@***.***> je napisao:

…

*NuDheeraj* left a comment (simstudioai/sim#1726) <#1726 (comment)> I switched to tag v0.4.23 same issue cc: @waleedlatif1 <https://github.com/waleedlatif1> @icecrasher321 <https://github.com/icecrasher321>, seeing the same recursive button error The above error occurred in the <button> component. It was handled by the <ErrorBoundary> error boundary., also I see basic requirements like zustand missing in package.json, is there some other branch I should use? — Reply to this email directly, view it on GitHub <#1726 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BU4CU7JOQFJTLBNI6GAWURT3ZLMDNAVCNFSM6AAAAACKFLSTCOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTINBVGQ4DMNZRGA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[NuDheeraj]

@emir-karabeg @waleedlatif1 any pointers on how to resolve this?

[Hung392001]

I also have the same issue with @NuDheeraj , I did some debug logs in backend
frontend:

backend:

[waleedlatif1]

@NuDheeraj its hard to tell, but the blank screen is usually the result of the browser going out of sync with the database. If you've logged into the platform on the same URL and have a different DB connected to it now than when you logged in, the session cookie in your browser is for a different DB and this may be causing issues. To absolve this, you need to open DevTools in the browser > application > cookies > delete the corresponding cookies from the old DB's session. Then you can try logging in again from scratch and see if this fixes the blank screen

[NuDheeraj]

@waleedlatif1 I have tried everything by now :), I have tried clearing cache, cleared application site data, installed on a new system from scratch, logged in as new user, tried a new machine, docker exec'd into the db to see if the user has permissions for the workspace and workflow.

Also I notices some weird bugs like when we first start the server, it complains and exits about many missing packages, like Zustand, loadash, etc. Also I am seeing some 404 errors when we are trying to open a canvas for the newly created users(as the graph is empty and backend throws error). I guess there are some seeding scripts or pre installation scripts that are not opensourced, hence you might not be seeing it.

Because of the above I think at this point the dev flow for external contributors is completely broken, it would be great help if you can fix the dev flow for us or suggest me what changes are needed.