I have a software made through which I deliver my game mods. I am not a coder or a software engineer. My app has encountered some error/bugs related to certificate/Code sign in the user end. The error is as follows:

Handshake error in client (OS error: CERTIFICATE_VERIFY_FAILED:Unable to get local issuer certificate(../../third_party/boringssl/src/ssl/handshake.cc.99……))

This issue is happening specifically to only those users who formatted their PC. I Made sure the Date and time is correct and in sync at the user end but still issue perist.

Is there any way this can be fixed without involving maipulating the app code?

Only one isolated case in which the issue got fixed is when I installed the certificate on fthe client pc by opening properties-certificates-then installing app certificate. But this did not work with any of the other users.