Could modify your Header. Also which browser are you using. Might be a some extensions blocking certain cookies or urls possibly. Also make sure you are going to a legit site. I saw someone else post they can get to it.
Here are some directions to try with chrome:
Install a User Agent Switcher extension:
Open Chrome and go to the Chrome Web Store
Search for "User-Agent Switcher for Chrome"
Choose a reputable extension (e.g., "User-Agent Switcher for Chrome" by Google)
Click "Add to Chrome" and confirm the installation
Configure the User Agent:
Click on the extension icon in your Chrome toolbar
Select "Windows" as the operating system
Choose a specific browser version (e.g., "Chrome on Windows")
Visit the website:
Go to the site that was previously blocking you
Attempt to log in
(Optional) Verify the user agent:
Open Chrome DevTools (Press F12 or Ctrl+Shift+I)
Go to the "Network" tab
Refresh the page
Click on any request in the Network panel
Look for the "User-Agent" header in the "Request Headers" section
Confirm it shows a Windows user agent
Remember to switch back:
When you're done, click the extension icon again
Select "Default" to return to your normal user agent
Here are some directions to try with chrome: