Please try to Clear the Cache of the application and then open it.
If that doesn't work then-
- You may please uninstall Adobe Acrobat from the Mi Pad
- Go to Adobe - Adobe Acrobat Reader DC Distribution
- Download the .APK file from here and reinstall the application
- Reboot the device and reopen the application.
Let us know if that doesn't work.
Sorry, it didn't work. There is no DC apk.
The link I have shared would help you downloading the Android version here and that you can transfer in your Mi pad.
Or else after clearing cache try installing the application from Play store.
There's no DC apk. It's the same old acrobat reader and the same problem
persists after clearing cache.