Firstly, make sure you are not running a VPN when you try and run Jaksta - they can sometimes interfere with the program and cause problems.
Other than that, are you able to send us a log file the next time you encounter this problem? You can find the Jaksta log file by going to the Preferences and clicking the Find Log File button
I have jaksta for mac version 1.5.1. When have Jaksta enable i get two different problem
1. ssl error "your connect is not secure" Browsers Google Chrome, Safari and Opera.
2. unable to connect to web page.