Hi
utpalsharma2015Sincerely apologize for any inconvenience caused. Please try to reinstall ASUS WebStorage, and log in the app again.
If the issue remain the same, please provide the information below so that we can better assist you.
1. Model Name: Settings>System>About phone
Refer to the link below to check the model name by model no. in the link
https://www.asus.com/support/FAQ/1014441/ 2. Your current firmware version
Setting >System>About Phone>Software information
If you try to update to the latest version, does the issue still remain?