Hi @helloHealth
Welcome to the Auth0 Community!
While searching for a potential solution, I found that the learnworld guide to setup SLO can have an error.
To logout users from Auth0 IDP you need to follow this URL https://YOUR_DOMAIN/samlp/CLIENT_ID/logout
not the regular one as mentioned in the guide
In the URL it will be https://YOUR_AUTH0_DOMAIN/v2/logout? client_id=YOUR_CLIENT_ID& returnTo=LOGOUT_URL where Client_id is the Client ID of your Auth0 application.
If you want to read more about SLO Auth0, you can find an excellent guide here.
If you found this post helpful or interesting, please give it a like . Your interaction makes a difference. Have a wonderful day!
Dawid