Hi @marekd,
Thank you for your reply. I got it.
In that case, I think that you should re-write "all 35+ layers" to "24 layers" on introduction page of Windy API v4.

@Marienka I sent the IP addresses to your email.
Please check it.

I use paid version of API4.
I think the paid version provide 35+ overlays.
24 overlays are no problem, but 11 overlays do not work.

Please check and help me.

Console error

• Uncaught (in promise) undefined

11 overlays do not work

• radar
• thunder
• deg0
• cloudtop
• cbase
• visibility
• swell3
• sst
• ozone
• snowcover
• cape

24 layers there is no problem

• wind (default layer)
• gust (default layer)
• rain (default layer)
• temp (default layer)
• clouds (default layer)
• waves (default layer)
• swell1 (default layer)
• currents (default layer)
• pressure (default layer)
• swell2
• gustAccu
• rainAccu
• snowAccu
• ptype
• rh
• hclouds
• mclouds
• lclouds
• fog
• wwaves
• cosc
• dustsm
• so2sm
• dewpoint

@Marienka I will ask him who live in Ukraine.
But I don't want to write his IP address on this board.
So, can you tell me your e-mail address?

@Marienka My IP address does not relate this problem.
Because I don't live in Russia or Ukraine.
I received this problem from the user of our service who live in Russia or Ukraine.

@Marienka They lives in Ukraine too.
They have blocked Yandex services.

@Marienka Hello, Our user in Russia tested again.
His all browser (Chrome, Firefox, IE, etc) could not display the windy map by API4.
And the console error of his browser is displayed.
ReferenceError: windyInit is not defined
I think "api4/auth" is no problem, but he can not connect "assets/libBoot.js".
And there are still some user in Russia they can not display the windy map by API4.

Please help me as soon as possible!

I published with API4 to our service.
The almost users are no problem with API4.
But there is the problem with some users.
I received the console error message from our user who can not display the radar map.
They can not display the radar map even the latest version of browser.
And many of them are in Russia.
And they can display the radar map with the embed type.
I guess that API4 is blocking a special internet provider.
I want to display the radar map to all our users.
Can you solve this problem?

-- Console error
This console error is not displayed to the almost users.

• URL:
  https://api4.windy.com/api4/auth
• Console massage:
  Failed to load resource: the server responded with a status of 404 (Not Found)

-- The browser they can not display the radar map
The almost users are no problem with these browser.

• Chrome (Windows)
• Chrome (Android)
• Firefox (Windows)
• IE11 (Windows)
• Samsung Internet (Android)