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Issue My site gatelink.com doesn't work on https but works on http

KnowMe

New Pleskian
Server operating system version
Windows Server 2022 Standard
Plesk version and microupdate number
Plesk Obsidian Web Pro Edition 18.0.69 Update #4
Hi,

My Sectigo (multi-domain) SSL certificate has no issue; bindings are correct; other sub-domains under gatelink.com like testing.gatelink.com work fine on https. Checked DNS settings, checked firewall; the site was working fine a few weeks ago and then suddenly stopped
 
Your login page goes to HTTPS just fine but I've noticed when going to HTTPS for default.aspx it gets me a 302 redirection.

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This makes me want to think there might be a rule in your default.aspx that does a redirection from HTTPS to HTTP. If there was an update done to the site you might want to check to make sure there isn't a redirection rule in the code. Look for something like Response.RedirectLocation or Response.StatusCode.
 
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