Requester Sandbox login failing with Proxy Error

I understand you're experiencing issues logging into the MTurk Requester Sandbox, with a "Proxy Error - Error reading from remote server" message after being redirected to AWS sign-in.

Based on the information available, this appears to be a specific issue with the Requester Sandbox login path rather than a general AWS authentication problem, since you can successfully log into both the AWS console and the Worker Sandbox.

Here are some troubleshooting steps you can try:

1. Double-check your login credentials: Ensure you're using the correct email address and password associated with your AWS account.

2. Clear your browser's cookies and cache: Sometimes stored data can interfere with the login process.

3. Try a different web browser or use an incognito/private browsing window: This can help rule out browser-specific issues.

4. Check if there are any ongoing AWS service outages that might affect the MTurk Requester Sandbox specifically.

5. Test your network connectivity to AWS endpoints with tools such as nslookup, ping, cURL or telnet to identify any potential network connectivity issues.

Since you've already tried multiple devices, networks, browsers, and even a VPN through different regions without success, this suggests the issue might be on AWS's side rather than with your setup. If the problem persists, you may need to contact AWS Support directly for further assistance with this specific service.
Sources
can't login aws account | AWS re:Post
Troubleshoot Amazon S3 errors from AWS SDK exceptions | AWS re:Post
something is very wrong I can post questions here but I can't sign into the AWS management console | AWS re:Post

I have the same problem. Could this actually be an issue on the AWS side?

For me, it works now.