If the issue persists, try opening the non-HTTPS site in an incognito window or another net web client.
This should help you avoid any interference sparked by existing cache data and surfing app-specific issues.
We’ve used Ubuntu to show the general flow.
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Reset web link controls
Misconfigured web link controls on your phone or computer can also affect your Wi-Fi connection.
Turn Off VPN
Are you using a VPN to stay safe while using public Wi-Fi networks?
you might turn off your VPN connection to enter the Wi-Fi login page without interference.
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If these drivers become corrupted, you’ll experience Wi-Fi connection problems.