eQall QR Code not showing in QX500 FW:6.3.5

[damc0308]

Although eQall IP line can be successfully configured, needed QR Code to complete provision of eQall software doesn't show at QX500 IP line settings. Tried on different browsers: Mozilla, Chrome and IE.
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Just found out there's an "ecmon connection failure" at System Events. I confirmed that both ecmon.epygicloud.com and monitor.epygicloud.com are ping reachable.

Still..verifiying with customer firewall if required ports are included in policies for the QX:
monitor.epygicloud.com 9443
ecmon.epygicloud.com 9449
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Problem solved!! It was customer firewall blocking required ports. QR Code is now generating successfully.