SPS error trying to read a file. Here is 1 of many items you can check

Document ID : KB000110984
Last Modified Date : 01/10/2018
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Question:
SPS error trying to read a file.Here is 1 of many items you can check
Answer:

Check the Web Server’s Certificate Expiration

https://docops.ca.com/ca-single-sign-on/12-52-sp1/en/troubleshooting/ssl-authentication-schemes-troubleshooting/ssl-troubleshooting#SSLTroubleshooting-ChecktheWebServer%E2%80%99sCertificateExpiration

Updating or using a new certificate has worked in many environments.