Recently we have found some SSL releated activation issues. You can see similar activation errors:
PKIX path validation failed: java.security.cert.CertPathValidatorException: timestamp check failed
We are fixing it now on the activation server end and it will be done shortly.
For now, please install the latest available builds where activation should work properly (suppressed this validation error):
WSC 4.x, Build 1411
https://flashphoner.com/downloads/builds/WCS/4.0/x8664/wcs4_opus/
WCS 3.x, Build 1412
https://flashphoner.com/downloads/builds/WCS/3.0/x8664/
RSGW for Wowza3, Build 1674
https://flashphoner.com/downloads/builds/server_core/x8664/
RSGW for Wowza4, Build 1673
https://flashphoner.com/downloads/builds/server_core/x8664/