Heads Up :
The post you are writing will appear in a public forum. Please ensure all content is appropriate for public consumption. Review the employee guidelines for the community here.
We faced a same issue with AnyConnect VPN with ASA running on Firepower.A workaround we found is to remove "url sign-out" under "webvpn"webvpn
saml idp [IDP URL HERE]
url sign-in [SAML SIGN-IN URL HERE]
url sign-out [SAML SIGN-OUT URL HERE] <-...
