On messages it says "We were unable to get your recent messages. Please try again later".

I'm having the same issue, on all win 10 devices... No error codes, just a message saying '! We are unable to get your recent messages. Please try again later.'

try removing the account from the console, doing a hard restart, hold the power button for 10 seconds while the system is on, and then re-adding the account

i tried with another device but still presents the same message

"We were unable to load your settings at this time. Please try again later."

Are you trying to access your messages on the Xbox website, or in the Xbox App, or on the console, when you get that error?

If you are getting that in your browser when using the Xbox website, I found that using a different browser worked.

While Firefox and Edge couldn't show my messages, Google Chrome did the trick.

Hi,

We understand that you really need to send a message through Xbox App. Here are steps on how to reset your Xbox App:

1. Go to Settings.

2. Go to System (Depending on which Win10 version you have, you might need to skip this and click Apps instead).

3. Go to Apps & features.

4. Find Xbox.

5. Click Advanced Options.

6. Click Reset button you see there.

We'll keep an eye on your response.