If you get an error stating:
Safari cannot open the page because the address is invalid.
This most likely means your device is not jailbroken.
All packages on Havoc require your device to be jailbroken in order for it to be used.
Click here to learn how to jailbreak your device.
If you need help jailbreaking, join the r/jailbreak Discord server Please note that all jailbreaks and Cydia will NEVER cost money, if you see any that does, its fake and a scam.