Install unknown app is greyed out

[Malikygaming]

I have a Motorola G 5G and when I tried downloading a apk it kept saying "your phone currently isn't allowed to install unknown app from this source" but when I went to enable it the button is greyed out and it won't let me enable it I have tried disable admin security, resetting app preferences, and factory resetting but none of it work any have a solution for it

 

[mustang7757]

Welcome to AC!

Where you trying install from a browser or file manager?

 

[B. Diddy]

Welcome to Android Central! Do you use the phone for work? Do you have any 3rd party security apps installed?