Hints for curtail in testing

com.github.huluti.Curtail ⚙ aarch64

screenshot-download-error
Error while downloading screenshot from 'https://raw.githubusercontent.com/Huluti/Curtail/master/data/screenshots/screen3.png': URL was not found on the server.
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asv-unknown-tag
:75 - developer
Found invalid tag. Non-standard tags should be prefixed with `x-`. AppStream also provides the <custom/> tag to add arbitrary custom data to metainfo files. This tag is read by AppStream libraries and may be useful instead of defining new custom toplevel or `x-`-prefixed tags if you just want to add custom data to a metainfo file.
asv-nonstandard-gnome-extension
:84 - kudos
This tag is a GNOME-specific extension to AppStream and not part of the official specification. Do not expect it to work in all implementations and in all software centers.