No icon showing on Map

I have a similar problem like this link: https://www.traccar.org/forums/topic/device-icons-not-showing-on-map/
I have tried solution exposed on many topic, I'm still facing the issue.
I check the database, there aren't GPS coordinate out of range. The issue rise since 2 days now. I use traccar version 5.10

What URL is it failing to fetch? Check the network tab for more details.

It failed to fecth index-x26j1x-z.js file, located in modern/assets/ folder. When typing the URL on browser I can access to the file.

That's not what I see.

Hi Anton,
The unique network fetch error I see, when switching to network tab is on this link https://cdn.traccar.com/map/fonts/Roboto%20Regular/0-255.pbf
Can it be the source of the issue?

Yes, that's probably it. What county are you in? I suspect the website it blocked.

Hi Anton,

I fixed the issue by changing the web UI with the last release of web UI. I think ,the link of the old web UI was not reachable. With the new UI, the link is reachable.