Auth0 is working locally but when I upload it to a hosted platform it no longer allows to login

Hello,

I have got Auth0 working fine locally using PHP but when I go to upload it to my hosted platform it no longer allows me to login, I just keep getting 500 error message from the browser

has anyone had any experience with this?

I have spent most of my day setting up auth0 and maybe its something small I’ve missed but I’ve been over the quick set up guides numerous times and they’re done to a T.