Can't link Weebly account to Square

[Williamscraig]

I want to be able to edit my Weebly website from Square.
Logged in to Square, from Dashboard I take the option Online, then Get Started. I'm prompted to:
Login to Weebly to link your accounts.
I try to login with the Weebly login username (and also if I try with the email address) and always get the error message:
An error has occurred. Please try again later.
I'm then stuck at that point, any help appreciated?

I have the strictly necessary and functionality cookies enabled.
I've tried with both Firefox and Edge.

[Breffni]

Hi there @Williamscraig, welcome to the Seller Community. 

Sorry to hear you're running into this and for the delayed response. 

If you have both a Weebly and Square account, and you’re experiencing issues trying to log in to one of them, it’s possible that you’re being redirected to the other. To avoid this experience, be sure that the email you’re using is the correct email assigned specifically to either of your accounts, and then take the following steps:

1. Clear the cache from your web browser’s settings.
2. Close all opened browser windows.
3. Re-open the browser, and go directly to either weebly.com or squareup.com to log back into your account.

Let me know if these steps resolve the issue, and if not I can gather some more details from you to take another look into this.