In this topic, I will show you guys how to basically crack apps, efficiently.
Method 1: How to fix iTunes Store on your PC/Mac
It seems like not all iTunes versions are broken. In fact, Apple has provided its business partners with an iTunes that allows installing & Downloading Apps from. Of course, you can use it too. Simply just install over your current iTunes and your iTunes Store error should be fixed.
Download: https://support.apple.com/en-us/HT208079 (Thanks to @Amuyea)
Method 2: Downloading from iDevice App Store. x32 or x64 portion only depending on your device.
Since iOS 9 was released, iOS will now start slicing the apps to save space on your device. Meaning if your device is x64, it will download only the x64 portion of the binary. However, when this happens, Rasticrac will fail to crack Sliced apps. In order to fix this, I have modified the rc.sh file to allow cracking AppSliced apps!
Make sure you are using the latest Rasticrac 3.3.6 from cydia.iphonecake.com. Then download new rc.sh and place it in /usr/bin replacing your old rc.sh.
Then proceed to crack the Sliced App from your iDevice App Store and it will show you the message when it detects the app is sliced but still continue cracking.
Alternatively, Clutch2 from cydia.iphonecake.com also works fine with cracking normal and sliced apps.
Method 3: Using iMazing on your PC. x32 & x64 binary portions
Open up iMazing, click the 'Apps' option then click on 'Manage Apps'. From there you should see all your current iTunes Library and the option to add another app from the App Store.
Click the 'Add from App Store' option, search for the app you want then download it.
Once the download is done, find the app in your Library (see screenshot above) and click on it to highlight it then click on the option 'Install to Device'.
Once the app is installed on your device, you can now simply use Rasticrac or Clutch to crack the app like normal and you will have both portions of the binary!