Hi @kwent
Sorry to see that things are not working as expected!
You should still be able to access your website’s login page at https://www-your-website-goes-here/wp-login.php. Here you can still enter your local WordPress credentials.
In regard to the error you should check that the Directory (tenant) ID and Client (application) ID that you find in Azure AD on the Overview page of your App registration match with their counterparts that you enter in the plugin’s Single Sign-on page in the corresponding fields.
Hope this helps!
-Marco
PS If all else fails you can disable the plugin by renaming the folder wpo365-login in your website’s plugins folder (in the WordPress wp-content folder). You can do this with the help of any FTP client.
