$ galculator 

(process:13532): Gtk-WARNING **: Locale not supported by C library.
	Using the fallback 'C' locale.
Gtk-Message: Failed to load module "unity-gtk-module"

(galculator:13532): GdkPixbuf-WARNING **: Cannot open pixbuf loader module file '/usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/loaders.cache': No such file or directory

This likely means that your installation is broken.
Try running the command
  gdk-pixbuf-query-loaders > /usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/loaders.cache
to make things work again for the time being.
Gtk-Message: Failed to load module "canberra-gtk-module"
Gtk-Message: Failed to load module "canberra-gtk-module"
[galculator] configuration file: Failed to create directory /home/didrocks/snap/galculator/100003/.config/galculator.
[galculator] configuration file: couldn't open configuration file /home/didrocks/snap/galculator/100003/.config/galculator/galculator.conf for reading. Nothing to worry about if you are starting galculator for the first time. Using defaults.
[galculator] Couldn't load /share/galculator/ui/main_frame.ui. This file is necessary     to build galculator's user interface. Make sure you did a make install and the file     is accessible!
Failed to open file '/share/galculator/ui/main_frame.ui': No such file or directory