Can't login to Zoho mail

Can't login to Zoho mail

I'm logged into Zoho but when I try to go in zoho mail I get:

Invalid request!

The input passed is invalid or the URL is invoked without valid parameters. Please check your input and try again.

I just set up my mx records and stuff with namecheap a few hours ago, and i get this when i try to access mail. please help