Hints for gcrystal in xenial

gcrystal/0.14.10-2: gcrystal-0.14.desktop ⚙ amd64

description-from-package
This component gets its description from the package it is located in.
This has several disadvantages, like missing localization, possibly too short descriptions, too technical descriptions for users of software centers, etc.
Please consider writing a metainfo file for this component. In the near future, components without metainfo file might be dropped from the metadata. You can consult the XML quickstart guide for more information on how to write a metainfo file.

metainfo-parse-error
Unable to parse AppStream upstream XML, the file is likely malformed. Error:
Opening and ending tag mismatch: metadata_license line 5 and metadata_licence, line 5, column 60
metainfo-no-id
Could not determine an id for this component. The AppStream upstream metadata likely lacks an <id/> tag.
The identifier tag is absolutely essential for AppStream metadata, and must never be missing.