[Forums] Can't access offline while using HTTPS

Hi, I've been using the offline component and it works fine when using HTTP. When I use HTTPS, I am getting this error 
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https://115.146.135.159/Offline/GetCacheManifest.aspx?eSpaceName=URC

As a result, the app doesn't run while offline.

What might be causing this? When I click the link, it seems fine.