Recently I noticed that whenever I try to login to a captive portal Wi-Fi page, all of the browsers that I'm using crash. This happens before the page even finishes loading and consenquently I am unable to log in to the Wi-Fi service.
I have tried using different browsers (Stock Android browser, Google Chrome, Dolphin browser and Opera Mini). The following error shows:
Unfortunately "browser" has stopped
for each of the mentioned browsers or sometimes they just close to home screen with no specific error message. I suspect it may be due to a conflicting certificate signature or problems with certificate because Chrome shows
NET::ERR_CERT_AUTHORITY_INVALID with HTS error but I have
no substantive evidence for this, since it used to work fine before.
Also I have noticed that on the other device running Android 7.0 it reports a problem with the certificate:
There is a problem with the security certificate for this site
What could be the cause of the problem and are there any workarounds to fix this?
Edit: I've included the screenshot