Windows 10: the download link is giving ERR_SSL_PROTOCOL_ERROR and only works when using specifically a...

so here is more details, I wanted to come back to playing league of legends and went to the website but each time I get to the download link then I get this error "This site can’t provide a secure connection" and "ERR_SSL_PROTOCOL_ERROR" and sometimes it's even a timeout errorI tried everything from turning off proxy to flushing DNS to clearing ssl state to trying different settings with ssl/tls to resetting network to using different vpn softwares, I even upgraded from windows 10 to windows 11 thinking it might fix the problem but nothing worked, restarting the router and the pc didn't workI

:)

 

Err_SSL_Protocol_Error

Hello again Gerald Vit,

That didnt work either,

The browsers keep on showing:

this site can't provide a secure connection err_ssl_protocol_error.

 

ERR_SSL_PROTOCOL_ERROR

When I click on a link in an email to read a newspaper that I have read for over a year, I get the following message: ERR_SSL_PROTOCOL_ERROR. There are a couple of other web addresses that I get the same error. I can access the newspaper by using a link in my Bookmarks Bar but not through the daily email. Thank you for your help.

 

Chrome ERR_SSL_PROTOCOL_ERROR on known working site

When I connect to Fee Guarantee - Index, Chrome gives me an ERR_SSL_PROTOCOL_ERROR. Firefox gives SSL_ERROR_RX_RECORD_TOO_LONG. Edge gives some generic error.

All other sites appear to work fine, including sites I know to be hosted on the same server machine. Others using my network are able to connect to the site fine as well.

The DNS is hosted in Cloudflare and uses Cloudflare's flexible SSL mode. However, when I disable Cloudflare, I get the same issue using the certificate installed directly on our server. Other sites using Cloudflare's SSL work fine.

Curl reports as follows

$ curl -v Fee Guarantee - Index
* Rebuilt URL to: Fee Guarantee - Index
* Trying 162.242.219.59...
* Connected to www.feeguarantee.com (162.242.219.59) port 443 (#0)
* successfully set certificate verify locations:
* CAfile: C:\Program Files (x86)\Git\bin\curl-ca-bundle.crt
CApath: none
* TLSv1.0, TLS handshake, Client hello (1):
* error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol
* Closing connection 0
curl: (35) error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol

Chrome suggested to run the windows diagnostic tool, so I did and it reported the winsock protocol wasn't installed. I followed instructions here [FIX] Windows Sockets Registry Entries Required For Network Connectivity Are Missing to reset my winsock drivers, ran into the group policy issue, and installed the registry files they provided. Retrying step two still failed, but the diagnostic tool no longer reports the problem.

I have also tried reinstalling/updating my network and chipset drivers to no avail.

Short of a clean install of Windows, how can I fix this issue?