1. Check Point User Center credentials and Internet access from the SmartConsole machine needed in R77.30 (for manual IPS update). In R80.20 you can specify whether you want to run the manual update from SC-machine, management server or gateway. SmartEvent is highly recommended for IPS reporting and visibility.
2.To minimize impact and false positives it's recommended that when you first deploy IPS you enable it in detect-mode for a couple of weeks period. After this you analyze all possible IPS events using SmartEvent and tune the protections accordingly.
3. R77.30 has a special troubleshooting mode that will change all (most) protections into detect-mode. If you see that some legitimate traffic is dropping add an exception for it.
4. Backout plan is to enable troubleshooting (R77.x) or detect mode (in R80.x) and install policy.