LinkedIn has released their new LinkedIn Identity support with OpenID that replaces their existing Sign in with LinkedIn product for SSo functionality:
Any new developer apps created will no longer have access to the Sign in with LinkedIn option. Instead, you will only see the new LinkedIn using OpenID option and will no longer.
Pathfix has added support for the new Identity provider. You can now log in to your account and click on the Identity tab and find it as LinkedIn V2 Identity.
The setup to active the SSO functionality (on code based or No code platforms) remains the same.