Now, when you try the app again, it will work without any trouble. Open Settings > General > Profiles and Device Management.Delete TweakBox from your device ( following the steps here ).This happens because the app source cannot be verified. Try the app installer again, and the white screen will be cleared.How to Fix White Screen – Blank Screen Error.Here are some of the common errors that occur during the download, installation, and usage of unofficial apps on an iPhone. You can also un-install TweakBox following the steps here. TweakBox will be removed from your device.Launch the TweakBox app icon again, and it should work without any errors.Look down the profiles list for TweakBox and tap it.Next, tap on Profiles & Device Management, as shown below.Open your iOS Settings app, tap on General.If you get the ( Untrusted Developer ) message, then follow the below steps and TRUST the developer and start using the app.Tap on INSTALL and follow any instructions on the screen to download and install your chosen app or tweak.Now you will see a list of Categories navigate to the one you want to download.Now you will see a menu bar, choose the ( Apps ) button, and tap on it.After download, find the app icon on your home screen and tap to launch it.The above steps explained on video ( YouTube ).The TweakBox app icon will be there. If the TweakBox app is not working, then try an alternative app installer. Tap, as the pages load, Install > Done.

You may be asked for your Passcode, type it in, and wait.

Tap on the Install option on the next screen.

Now you will see the Profile Downloaded pop-up.

Tap on any of the configuration profile download buttons above and then tap on Allow, as shown below.

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