SPS error trying to read a file.Here is 1 of many items you can check
Check the Web Server’s Certificate Expiration
https://techdocs.broadcom.com/us/en/symantec-security-software/identity-security/siteminder/12-52-01/troubleshooting/ssl-authentication-schemes-troubleshooting/ssl-troubleshooting.html#concept.dita_a26d1e12bcbab94ba334afc6f339974edb9b9e7a_AfterFollowingPreviousProcedureStillNoCertificatePrompt
Updating or using a new certificate has worked in many environments.