Hints for blackbox-terminal in ubuntu

Warnings

• asv-relation-item-redefined
  :27 - recommends & supports
  This relation item has already been defined once for this or a different relation type. Please do not redefine relations.
• asv-relation-item-redefined
  :28 - recommends & supports
  This relation item has already been defined once for this or a different relation type. Please do not redefine relations.
• asv-relation-display-length-value-invalid
  :31 - xsmall
  This `display_length` item contains an invalid display length. Its value must either be a shorthand string, or positive integer value denoting logical pixels. Please refer to the AppStream specification for more information on this tag.
• screenshot-download-error
  Error while downloading screenshot from 'https://i.imgur.com/38c2eX4.png': Unexpected status code: 429
  This might be a temporary server issue, or the screenshot is no longer available.
• screenshot-download-error
  Error while downloading screenshot from 'https://i.imgur.com/2zH4FIj.png': Unexpected status code: 429
  This might be a temporary server issue, or the screenshot is no longer available.