On screen: Error 0x80070057
This error is produced locally. It does not appear because the service is down, so the fixes below are worth working through in order.
Microsoft maintains two separate articles under this number, and they are different problems.
The current one is for Windows: it occurs when you try to install a game or app to a solid state drive, and Microsoft's explanation is that this may be a transient error, or there may be an issue with installing games to your SSD.
The legacy one is for Xbox 360, where the same number meant a video file was corrupted or in an unsupported format. Microsoft marks Xbox 360 content as no longer maintained.
Most pages ranking for this code blend the two. If you are on a PC, the video advice is irrelevant; if you are on a 360, the SSD advice is.
Which device are you on? That is the entire diagnosis, and it decides which of the two sets of instructions can possibly apply.
Operator documentation: support.xbox.com. A note on sourcing. Microsoft's support site is a single-page application: any invented URL of the form error-code-anything returns HTTP 200 with an empty shell. So a link that looks like it works may lead nowhere, and the 0x prefix is genuinely inconsistent between articles. The URL above is the one that actually resolves for this code. The Windows article needs the 0x prefix; the Xbox 360 article lives at a different path under /errors/xbox-360/ without it. Two URLs, two meanings, one number.
Microsoft maintains two separate articles under this number, and they are different problems.
This error is produced locally. It does not appear because the service is down, so the fixes below are worth working through in order.
Start with: On Windows: wait an hour or two and retry. Microsoft's own first step. They describe it as possibly transient, and retrying genuinely resolves a share of cases.