Solution:
- Go to mmc > Add/Remove Snap in > Certificates > Computer Account > Local Computer;
- Delete following certificate (if exist) under “Personal/Certificates” and “Trusted Root Certification Authorities/Certificates”;
- *.xconnect
- *.xconnect_client
- <Sitecore9 site name>
- DO_NOT_TRUST_SitecoreFundamentalsRoot
- DO_NOT_TRUST_SitecoreRootCert
- Go to mmc > Add/Remove Snap in > Certificates > Computer Account > My user account;
- Repeat step (2);
- Go to C:\certificates, delete all *.crt files;