Hello. Now I have the same problem on referral page -

"Internal server error
500

Something has gone seriously wrong.please try later.

If you are using vpn/proxies please turn it off."

And I dont use any vpn/proxy. It is seems that this bug still exist on your faucet.
And when I login, I cant put that mark to be "stay login", it is inactive for me for some reason(another bug?), so I must login each time I want to claim(Firefox browser).