This bug was fixed in the package ubuntustudio-meta - 0.177
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ubuntustudio-meta (0.177) bionic; urgency=medium
* Refreshed dependencies
* Added fonts-noto-color-emoji to desktop-recommends (LP: #1746310)
* Removed gtk-theme-config from desktop-recommends (LP: #1759824)
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Debdiff for an update to ubuntustudio-meta to fix this and another bug.
** Changed in: ubuntustudio-meta (Ubuntu)
Status: New => Confirmed
** Patch added: "ubuntustudio-meta.debdiff"
https://bugs.launchpad.net/ubuntu/+source/ubuntustudio-meta/+bug/1759824/+attachment/5095916/+files/ubu