Got "error validating the installer data", tried the tricks on the internet but failed.

Hello, I've been trying to install macOS from USB. But I'm stuck at this screen below. Some things I've tried so far:

• Redownloaded the installer image and even tried the previous versions.
• Tried to change the date of the system/bios near the release date or current date.
• I have made sure the image is not corrupted. I've checked the checksum of the image file based on this: https://github.com/notpeter/apple-installer-checksums

I've checked the installer log and it says something like "Failed to validate" or "failed to verify file". I've no clue what should I do next.

Any help is welcomed. Thank you.

https://i.redd.it/gg3ymif37au31.png