Why can't I log into developer.paypal.com with any of my Sandbox email accounts?

[Russtopia]

I have the default <email>-facilitator and <email>-buyer addresses in here, but I can't log into them with their assigned passwords.

I also tried defining new ones, <email>+paypalbuyer1 and <email>+paypalmerchant1, hoping to use those instead since these won't require defining a pair of new real gmail accounts (the '+' is ignored by gmail and redirects to the main <email> instead).

If I can't log in, I can't define test buttons can I? The developer site is very confusingly laid out.

Using Vivaldi on Linux x64.

Thanks,

-Russ

[MTS_Adam]

Hi Russtopia,

Thanks for reaching out, and welcome to the community!

When logging into https://developer.paypal.com/, you need to use your live PayPal email address and password. 

Once you have created your sandbox accounts (which it looks like you've done with the multiple buyer/seller emails added), then you will use those email addresses + passwords to access the PayPal Sandbox at https://www.sandbox.paypal.com.  Once you've logged into sandbox.paypal.com, you can create your buttons similarly to how you would on the live site, only the URLs will have sandbox in them, i.e. https://www.sandbox.paypal.com/buttons/.  

Hope that clears things up a bit!

Sincerely,

Adam