This could be because of a missing certificate chain due to which your firewall/IDP/proxy may not recognize, or block the SSL/HTTPS content. This usually happens if your firewall/IDP/proxy is not updated regularly. In this case please install the ValiCert Legacy Certificate Chain from the GoDaddy repository and try again.
My firewall/IDP/proxy is rejecting SSL/HTTPS content from BrowserStack.com
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