I have made some changes in the saml.config.
1. installed the idp.pfx in the certificate store.
2. export the idp.cer from the store.
3. uploaded the idp.cer file to the IDP provider.
Changed in the saml.comfig
<ServiceProvider Name="DEV_SB" LocalCertificatePassword="password" LocalCertificateFile="C:\Project\idp.pfx" />
The X.509 certificate could not be loaded from the file
can you please help to resolve the error