Connecting to Calendly and finding strange error against my website

[alaine27]

Hey guys, 

I have been using paypal and calendly for a while. I changed my paypal password and then a client went to pay and came up with an error. 

I thought that disconnecting my paypal and reconnecting it would fix the problem but as I am moving through the process to reconnect it, it is giving me a weird error on my website, saying its not valid. I've tried my facebook link, with http, without http, it keeps coming up like this without explanation. 

I would love some help!

Warmly,

Alaine