It looks like a request to access Vuforia Chalk service is being blocked.
[ISSUE] Access to Vuforia Chalk service from certain countries are restricted using Amazon CloudFront Geo Restriction. When affected a message like below is likely shown.
"The Amazon CloudFront distribution is configured to block access from your country. We can't connect to the server for this app or website at this time. There might be too much traffic or a configuration error. Try again later, or contact the app or website owner. If you provide content to customers through CloudFront, you can find steps to troubleshoot and help prevent this error by reviewing the CloudFront documentation. "
[ENVIRONMENT] Any Vuforia Chalk Service
[WORKAROUND] No workaround is provided. Using VPN might mitigate the situation.