Certain UWP Apps Won't Install From the Microsoft Store

As it currently stands there are five UWP apps that won't install for me.

• Windows Terminal Preview
• Slack
• Xbox
• Xbox Game Bar
• Skype

I've used WSReset.exe and that didn't help, I tried to install Windows Terminal using the .msixbundle file that Microsoft provides on Github, and I've tried to install the apps directly (the direct method I used is this command in a folder that contains a UWP app Add-AppxPackage -DisableDevelopmentMode -Register .\AppxManifest.xml) which also fails. Those last two methods both fail with this error:

App installation failed with error message: AppxManifest.xml(50,14): error 0x80070005: Cannot register the Microsoft.WindowsTerminalPreview_1.0.1402.0_x64__8wekyb3d8bbwe package because the following error was encountered while registering the windows.appExecutionAlias extension: Access is denied.
Try again and contact the package publisher if the problem persists. (0x80070005)

Oddly enough, since the apps do download, I'm able to run Terminal directly from its folder. I have no idea why this is happening and I'd love to get pointed in the right direction.