The error itself can vary depending on the workflow involved. For a reset password function it might read;
The page cannot be displayed because the HTTP version is not supported.
The event viewer however contains more useful information in the info section. The source should be 'PM UserUI'
Ensure the Mail and Mobile attributes are populated with appropriate values and the issue should clear.
There is an enhancement request in for Password Manager to allow mapping of attributes. This is ER # TF00761156. For more information please see this article;