Error - megapixels not opening

[Anna]

Unfortunately,

Code:

sudo dpkg-reconfigure megapixels

did not do the trick on my phone.

Going

Code:

sudo apt purge megapixels

and reinstalling from http://ftp.debian.org/debian/pool/main/m/megapixels/ did not work either; simply because I lacked the skills or a step by step guide, so I only got error messages.

So I did not know anything better than to

Code:

sudo apt install megapixels

What should I say? It works again.