Help/Support Appcake 4 legacy for ios 10.3.3 install error 999

[safapatel 0 iPad 4 10.3.4]

Hi,

From last one month I encounter 999 error in appcake while installing apps, even latest and old appsync are causing same error . No other Appcake versions are working on ios 10.3.3. Even formatted ipad many times ,still no update..... 

[Chewybacca 1.8k iPhone 8 12.1]

Do you have appsync installed?

[cheserem 0 iPad 4 10.3.4]

I have faced the same problem but as a work around I installed mobile terminal from cydia repo: https://cydia.akei.ai I downloaded Appsync Unified that is found under Tweaks. I then installed appcake version 5.6 then opened Mobile terminal and ran the following commands:

appcakeinst <ipa package name> 

and Success on install