# ASSET_INVALID: Asset is not what its name says > Asset is not what its name says | Severity | Fault | Stage | | -------- | ----------------------------- | ------------ | | error | customer (the source package) | build output | ## What it means An image or font the package holds is not a file of the type its extension names (a .png that is not a PNG, a .woff2 that is not WOFF2), or an SVG is not well-formed XML of the SVG namespace (a markup error, an unknown entity, a document type with declarations, an SVG without the SVG namespace). The CDN serves each asset with the type of its extension, so a mismatched file would break or be something else. ## How to fix Export the file again in the format of its extension, or rename it to the extension of its real format. An SVG needs xmlns="" on its root and only the five XML entities (&, <, >, ", ') or numeric ones.