UPDATE: THIS ISSUE HAS BEEN SOLVED - PLEASE RE TRY ACTIVATING SANDBOXIE NORMALLY.
LET US KNOW IF YOU ENCOUNTER ANY NEW ISSUES WITH ACTIVATIONS.
If you are experiencing issues activating Sandboxie, please be sure of the following:
1 - You are using Sandboxie 5.30
2- TLS 1.1/2 is not turned off (click on start type inetcpl.cpl --> Go to the Advanced tab and ensure Use TLS is checked)
If the problems persist, please provide the following information in this thread:
1- Sandboxie version
2 - Screenshot of the error message
3 - Screenshot of TLS settings as covered above
4 - Windows update status (is it up to date, if so what version? )
Also, please let us know if the Offline Activation works for you:
Offline activation --> please use this link, as the one in the offline activations steps will fail
Offline activation steps