Hello, Вячеслав Воинственный.

This problem is not only with your PC. For example, I have the same thing.:

Firstly, there is a warning that the site is unsafe and may be fake (phishing). And secondly, all the background information is available on the official OBS studio website*: https://obsproject.com/help

I strongly recommend not using questionable sites, as they may provide viruses, etc. instead of the OBS directory.

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.*

The message is an "Access Denied" error from a content delivery network (CDN) similar to Akamai. It indicates that the CDN is blocking requests from the current IP or origin, often because it detects too many connections in a short time and treats them as a potential attack.

To address this:

1. Reduce automated or repeated requests
   • If any software, script, or device is repeatedly checking or pinging that site (for example, connectivity tests or frequent download checks), increase the interval between checks or disable them temporarily.
   • In an enterprise network, ask the network administrator to review any monitoring or connectivity-test tools that might be hitting that domain too frequently.
2. Wait for the temporary block to clear
   • These CDN protections are usually temporary. Once traffic volume from the IP drops below the CDN’s threshold for a period of time, the block is typically removed automatically.
3. If on a corporate or shared network
   • Contact the network administrator so they can:
     • Check whether any internal device or proxy is generating high-volume requests to that site.
     • Adjust monitoring tools or other automated traffic that might be triggering the block.

If the issue persists even after reducing traffic and waiting, contacting the site owner’s support from a different network (or via their general support channels) and providing the full “Access Denied” message and reference number can help them investigate on their side.

References:

• Error message when you visit a Microsoft website that is hosted on Akamai CDN: Access Denied