Hi Glenn, 

Thanks for reaching out. Checked with the team again about the Authentication Error you're getting and they advised the below steps if clearing cache and cookies doesn't help:

1. Attempt to login
2. User ends up on the authentication error page with the URL: mysageone.na.sageone.com/.../error-id-provider 
3. If you remove /errors/error-id-provider from the end of the URL they should be able to access their account

Here's the chat link to contact the team should you need further assistance getting into Sage Business Cloud Accounting http://1sa.ge/Nhh530ryUpN.

Hope this helps!

Warm Regards, 
Erzsi

didn't do anything for my sign in.  Just repeated the error message.

Are you using Chrome? Would recommend MS Edge

For Chrome, when clearing cache and cookies, select the "all time" time range in particular, shown below:

For Safari, 

Try going to  Settings > Privacy 

> Manage Website Data…, type in “sage.com” to remove cache for all sage related websites.

Then launch a new tab to sage.com > log in to log into Sage Accounting

If this helps, please mark the suggested answer as Verified . Thank you!

Hi Glenn Smith

You may encounter this error message when you are trying to access Sage service using the wrong email address. Please let us know the product you are accessing, and its URL 

If this is for Sage Accounting email support at [email protected] and include your account number and email address you are using.

Note: do not post personal information here.

Regards

JohnS