Hello Kelly,
My name is Hanem, an independent advisor, and I'm here to help you.
I'm sorry that you are experiencing this issue, and I will try my best to assist you.
When did this issue with your apps start to happen? Are there recent changes or updates installed?
The Xbox remote play black screen error occurs due to some software issues with your console, it’s not set up correctly or because of connectivity issues.
I understand that you already exhausted the troubleshooting steps found online. Let us try some other fixes that worked with other Users.
Can you try changing the port your xbox uses in the network settings:
Settings -> General -> Network Settings -> Advanced Settings -> alternate port selection:
Then change the port to ANYTHING else -> press B
**Make sure it says NAT Type: Open
Please make sure you have the Xbox app updated. You can also test it by plugging into a different device and see if problem persists.
However, if this is not the case, the next step is to contact Xbox support for more help. Here is the direct link for Xbox Support: https://support.xbox.com/en-US/contact-us
I hope this is helpful. If you still require assistance, feel free to respond, and I'll be pleased to help.