Thank you for your hard work on shutter packaging.
As I sent you earlier, gir1.2-appindicator3-0.1 has been removed from Debian Bullseye, so a replacement package is needed.
I looked up the Debian package and found gir1.2-ayatanaappindicator3-0.1, so I asked the shutter team if this package was available and they got a patch.
The patch contents are at the following URL:
https://github.com/shutter-project/shutter/commit/27935490c32a35acea9f60629593a883b1a39faaSorry for just uploading a new shutter to the repository, but the gir1.2-appindicator3-0.1 package is no longer maintained after Debian 10, so instead of the gir1.2-appindicator3-0.1 package, update the dependencies to gir1.2-ayatanaappindicator3-0.1 You need to change it.
In addition, the shutter team is introducing gir1.2-appindicator3-0.1 (gir1.2-ayatanaappindicator3-0.1 on debian 11 and ubuntu 21.04, etc.) as an optional package.
Accordingly, in the debian/control file of the Debian shutter, please consider removing gir1.2-appindicator3-0.1 from depends and separating it with suggest, etc.
We apologize for not being careful in advance and disrupting packaging.