Hello everyone, I was having this same problem since yesterday and found a fix for it that worked, here you go:
“To address this issue please reset your Internet options by following these instructions: Go to Start > Control Panel > Internet Options > Click the Advanced Tab. On the Advanced Tab Afterward click Reset > Delete Personal Settings > and click Ok. Then go back on the Internet Options and on the advanced tab, scroll down to Security and un-check "Check Server Certificate Revocation" and "Do Not Save Encrypted Pages to Disk" then click on Ok."
source: https://forums.station.sony.com/landmark/index.php?threads/launchpad-was-unable-to-connect-constant-error-_.31657/ (8th post)