Error examples:
- Unable to validate assertion: email must not be blank
- Unable to validate assertion: name must not be blank
- Unable to validate assertion: email must be a well-formed email address
This error indicates that the SAML single sign-on authentication for your organization’s Grammarly subscription has been set up incorrectly in your organization’s identity provider.
To resolve this issue, please contact your organization’s IT support with a request to ensure that access to Grammarly is set up as described in this article: Add Grammarly to an identity provider
If you see the “Unable to validate assertion” error when setting up SAML single sign-on or signing in to your account, it typically indicates that the parameters in your identity provider were mapped incorrectly.
To resolve this, we recommend verifying that the mapping of all LDAP attributes and the outgoing name ID format are set correctly.
Grammarly supports the following name ID format: EmailAddress
The required attributes/claims:
- EmailAddress
- FirstName
- LastName
Note: The names of attributes/claims must follow the specified format. Alternative name spellings or FriendlyNames are not supported.
For more information, please see this article: Add Grammarly to an identity provider