Zephyr fails to open with error code 404

[jonathan_g]

I'm trying to open Zephyr but I get an error message:
"

We can't find the page you're looking for

The view does not exist in this board.

Error code: 404

"

After refreshing many times it works.

[Hari Krishna]

Hi @jonathan_g ,

This is a known behavior with Zephyr Scale and is usually caused by a temporary loading or sync issue, not a permanent error.

The 404 appears when Jira tries to open a Zephyr view that hasn’t finished loading or syncing yet. That’s why refreshing the page a few times eventually works.

To reduce or avoid this:

Use the “Go to the default view” button when the error appears

Make sure you’re opening Zephyr from the Apps menu (not a bookmarked URL)

Clear browser cache or try incognito if it happens frequently

Ensure you have access to at least one valid Zephyr test view in that project

If the issue keeps happening even after refresh and across users, it’s worth raising it with Zephyr Support, as they can check backend sync or permission issues.

[jonathan_g]

Thanks @Hari Krishna 
I've tried all of the above and nothing works.
When I open Zephyr from the Apps menu it opens the following URL:
https://layerxsecurity.atlassian.net/jira/software/c/projects/POC/boards/24/not-found

I don't know what is ther "not-found" at the end.
I tried to remove it and still it doesn't work.