iTunes Enterprise 12.6.5.3 Fails to download apps

I'm using iTunes version 12.6.5.3 (https://support.apple.com/en-us/HT208079) which is the latest version that supports the App Store on Windows 10.

Suddenly, on the evening of 2/7 whenever I try to update or download an app the app will download, get to the "processing part" then throw either error 8288 (An unknown error occurred. Please check that the network is active & try again). If I re-try to download the error comes back 416 (An unknown error occurred. Please check that the network is active & try again). I can sync without issue as well.

I've also noticed that in my "Mobile Applications" folder a ".app" file appears with any App that's being downloaded/updated. So say Twitter has an update, I'll get a "Twitter.app" file sitting in there & the original "Twitter 7.41.1.ipa" remains as well.

Not sure if it's an Apple problem or what. At the same time this issue is happening I've downloaded updates to podcasts without issue & can access the App Store from the App Store tab. The PC is connected to the internet.

I've tried the following:

• Rebooting
• Deleting anything in the Downloads folder
• Deleting anything in the iTunes Media folder

Any suggestions? I cannot contact Apple as this version does not have support. Everything worked fine on the morning of 2/7, but since then I haven't been able to update or download a single app without getting the 8288 or 416 error.

Thanks in advance.