CMS ui not loading

CMS UI was working fine and all the sudden i am getting the following errors

07-Mar-2023 13:59:23.320 SEVERE [main] org.apache.tomcat.util.digester.Digester.<clinit> Unable to load property source[com.hp.ucmdb_browser.tomcat_config.CustomPropertyDecoder].

2023-03-07 14:00:12,461 ERROR [InitSchedulers] URLPinger - Error when pinging URL PKIX path building failed: Unable to find certificate chain.

My certs are not expired and have tried everything i can think of. Anyone come across this issue? No changes were made.