invalid_image
Status 422. The picture is not one a store can use.
What it means
The file is not a PNG, JPEG or WebP by its own bytes, is under 16 or over 4,096 pixels on a side, or was sent labelled as another kind of file. SVG is never taken. Nothing was kept.
What to do
Send a PNG, JPEG or WebP file labelled as what it is, or a picture in your Shopify Files as source_url.
Safe to send again?
Not as it is. Change what the answer points to, then send the request.
Where you can meet it
POST /stores/{store_key}/images: Upload a picture for the store's branding (a logo, a square logo, a cover)
Every code, and the shape of an error answer: Errors.