HELP, can't access this url while on VPN

Hi, im trying to access a mobile phone provider’s page in Colombia. im using vpn with the server location set to Colombia, but the page just loads blank with a red error strip. Instead it should load the spaces to write user and password…

as soon as I turn the vpn off, the page loads correctly.

the url is https://mi.tigo.com.co/ingresar/correo

I verified for DNS leaks and there is none.

thanks for your help

there are millions of sites that do not want to allow access to the site if the user is using a VPN… It is a cat an mouse game. Good luck but the VPN users are going to lose.

So there just black listing all vpn servers?

I see the location of the vpn server, and verified it with a representative from the Von provider.
I tried changing server many times. But it doesn’t work

Yeah without vpn it does work. I don’t understand why they do that (that extra effort for what benefit)?. I need to find a secure network to then place a payment on their platform then