Windows 10: I am unable to change the lock screen background from a solid blue color

No matter what I do, I cannot change my lock screen background. I'm currently trying to change it to a picture of Deep Rock Galactic's Salt Pits biome, but when I try, the preview goes black and has a loading icon that never seems to stop. I've tried:- Letting the picture load for 10 minutes, seeing as it's only 422KB- Trying a different picture- Selecting one of the default backgrounds mainly the Wharariki Beach one, which only loads a preview- Searching for other solutions to the problem here, with most answers I found leading to a thread titled "Windows Spotlight lock screen picture won't

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How do i change the background of Lock Screen to solid color?

How do i change the background of Lock Screen to solid color?

Reminder, i am NOT referring to the login screen. There is a regedit i have tried that people suggest, creating DWORD 'DisabledLogonBackground', and changed it to "1". Then go to Colors in settings and choosing accent color. This DOES NOT work, this changes
the background color of the Login Screen.

I see questions just like mine and all of Windows Employees and Independent Contractors are getting confused and giving us directions to change the Login Screen background.

 

Lock Screen solid color background?

Lock Screen Color:









Login In Screen:

 

Lock Screen solid color background?

If I'm not mistaken the Login Screen inherits the Accent color. So if you create a solid picture of that color and set it as your Lock Screen background you can sync them with this setting.