TikTok Account Creation using Twitter: The Privacy Policy and Terms and Conditions links crash the app

TikTok app for iOS (version 12.1.0)
Date: 07/15/2019

Description:

The TikTok app for iOS will crash when the user selects the "Privacy Policy" or "Terms and Conditions" links from the Twitter Authorization pop-up page. I would think that this is (somehow) a violation of Twitter's rules to not have these pages accessible by a user at the time of signing up.

I'm writing this down here - then writing a review in the App Store. Then i'll raise a privacy concern about another issue (while also pointing out this problem) and then send it to Apple and Twitter. I'll cc TikTok.

Steps to Reproduce:

1. Download and launch TikTok (12.1.0)
2. Head to a part of the app that prompts account creation (like "Me")
3. From the "You need a TikTok account to continue" choose the Twitter option
4. From the Twitter auth pop-up select either "Privacy Policy" or "Terms and Conditions"

Result: The app crashes if the user selects either "Privacy Policy" or "Terms and Conditions" from the Twitter Auth pop-up page

Expected: The app should not crash if the user selects either "Privacy Policy" or "Terms and Conditions" from the Twitter Auth pop-up page

Select an option like "Me" to activate the sign-up message...

Choose the Twitter option....

Choose either the "Privacy Policy" or "Terms and Conditions" links on this page....