Boot Camp Assistant thinks my 64-bit Windows 10 ISO isn't one

I just completely reset and updated my Early 2015 13" MacBook Air to macOS Catalina, and I wanted to install Windows 10.

I downloaded a fresh ISO of 64-bit Windows 10 using Microsoft's Media Creation Tool, and yes, I made sure it's 64-bit only and not "32-bit/64-bit" but Boot Camp Assistant thinks the ISO isn't what it needs.

I've searched around on the net and people say to redownload the ISO because it might possibly be corrupt. I've redownloaded the ISO three times now, and it still doesn't work.

The error message is as follows:

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Need 64-bit WIndows 10 or later ISO file.

Boot Camp only supports 64-bit Windows 10 or later installation on this platform. Please use an ISO file for 64-bit Windows 10 or later installation.

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Please help.