DataTemplateExtension error with some packages

[MScriptGit]

Hi, I'm still pretty new around C# and MAUI, but I'm getting a weird error.

When I try to use the YoutubeExplode package or the SpotifyExplode package I get this error:

"DataTemplateExtension: Could not
locate type for local: MainPage."

At first I thought it might be a YoutubeExplode error, but after trying to use SpotifyExplode, I get the same error, leaving me to believe that it might be a MAUI error in stead.

As soon as I remove the package-code from the main function, the error dissappears.

I hope someone knows how to solve this!