Known Problems
"Turn on Documents in Settings > Installed apps first" issue
Tools > Animated Gif, Tools > Create PDF, Tools > Compress to ZIP
This is a common issue with Xiaomi devices.
  1. Run Photo Editor.
  2. Goto Setting.
  3. Turn off Use "Documents" API.
"Screen Overlay Detected" issue
How to turn off Screen Overlay Detected on any Android Device
  1. Open Settings.
  2. Scroll down to Apps.
  3. Tap on Three Dots.
  4. Click on Draw Over Other Apps.
  5. Again tap on Three Dots.
  6. Click on Show System Apps.
  7. Now Turn off Screen Overlay of all apps.
Lollipop 5.0.X custom font issue
https://androidbycode.wordpress.com/2015/06/02/help-my-custom-font-does-not-work-on-android-5-0

This issue was fixed with the release of Android 5.1

Android Lollipop 5.0.x: convert the font in http://www.freefontconverter.com

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