Hi, we'd request you follow the below steps:
1. Clear system cache.
2. Try the same under safe mode:
Hold the power button for 5 seconds => When the screen flashes with option => Press & hold power option => You will get an option to restart in safe mode
3. If still you face the issue factory reset your phone after taking a full backup.
You may click on the following link to download latest update manually, request you to read the instructions before upgrading and take a full backup of the device before. Click here:
https://www.asus.com/in/Phone/Zenfone-Max-Pro-M2-ZB630KL/HelpDesk_BIOS/