Your connection is not private on Chrome
Why it happens on Chrome
Chrome caches HSTS state per domain, so once a site has failed it keeps refusing even after the certificate is fixed.
The fix on Chrome
Go to chrome://net-internals/#hsts, enter the domain under 'Delete domain security policies', then hard-reload. Never use the 'thisisunsafe' bypass on a site where you enter a password.
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If that didn't fix it
Chrome has its own failure mode, but Your connection is not private has a wider set of causes that apply everywhere. The most common one overall is: the certificate expired (net::err_cert_date_invalid).
All causes and fixes for Your connection is not privateYour connection is not private on other platforms and devices
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