Found a way to update. Please follow the below tutorial.
- Download the folder https://mega.nz/folder/hMI1CQ7B#2oIjaFuEIKaxdu2h6--nqA (Mirrors are highly appreciated, so download and upload for others).
- Place this folder in a USB drive.
- Use an OTG cable to connect the USB drive to the P50 Pro.
- Dial *#*#2846579#*#* from the dial pad.
- Select option 4, and then option 1, press ok. The phone will restart and the upgrade will start.
CAUTION
******** This process will wipe all the data.
******** I am not responsible for any bricks.
Important Points
If you have trouble downloading the whole folder from mega, download the files individually and place on the USB drive. Make sure the folder structure is same on the USB drive as in the download link.
If you face error when copying files to USB drive, check the file system. Change the file system to either NTFS or exFAT.