Firewall receiving a HTTP 401 error when trying to access the Minemeld server

[Networks01]

Hi All, 

I've configured an external dynamic access list with the relevant account username/password to reach our minemeld server. When I test the connection however using 'test source url' in the external dynamic list configuration, this fails with a URL access error. 

On the minemeld server log:

127.0.0.1 - - [26/Sep/2019:14:25:45 +0100] "GET /feeds/o365-any-any-url-feed HTTP/1.0" 401 12 "-" "curl/7.60.0"

127.0.0.1 - - [26/Sep/2019:14:26:03 +0100] "GET /feeds/o365-any-any-ipv4-feed HTTP/1.0" 401 12 "-" "curl/7.60.0"

So the request is hitting the minemeld server, and I've also configured account on the firewall with the feed user account.  I've imported the certificate as required in this guide:

https://live.paloaltonetworks.com/t5/MineMeld-Articles/Connecting-PAN-OS-to-MineMeld-using-External-...

Can anyone help with the URL access issue?

Thanks

[Networks01]

Also, just to add, after doing a tcpdump on the minemeld server I can see the TLS handshake completes with the firewall - with application data being sent. However, within the same second the firewall sends a FIN packet. 

Please let me know if you can help!

[Networks01]

Turns out I'm getting the above certificate error, but I followed the guide exactly here:

https://live.paloaltonetworks.com/t5/MineMeld-Articles/Connecting-PAN-OS-to-MineMeld-using-External-...