Cant open any files

Hi, 

Hope you are doing well. 

We are sorry, you're having difficulties. Please help me with few details to understand your issue better. 

1.  Make and model of your device? 
2. Application version? 
3. What is file format, name and size?
      

We did try to replicate the behavior on our end, however, it is working fine. Make sure your application is updated. Do save your work then try to sign out and sign in back. Reboot your device. 
For Android Adobe Reader Mobile version: 21.4.0

For more help refer to:  

*Android- https://www.adobe.com/devnet-docs/acrobat/android/en/troubleshooting.html#get-help-and-find-answers

Let us know how it works at your end. If you have any further queries please feel free to reach out to us.  

  
Regards  
Ria