trying to install add-on but not working
99472
Fspy add-on not installing
78011
Unable to install package post adding ppa
21617
Why can't I press the Install button when installing applications from unknown sources?
80579
No install button in software centre?
140793
Problem installing a package
36696
Unmet dependencies unable to fix
129136
Will visual studio 2010 express support addins?
1632
How do I fix a "Failed to download package files" error?
98511
16.04 Cannot install anything from Ubuntu Software center
95351
"message failed to fetch from registry" while trying to install any module
37912
Addons: Only some .zips will install
145277
How do I resolve this error when installing the Forge source?
24936
Building an Internet Explorer Extension/Add-On?
86448
Can't install unity tweak tool
157921
Installing Guest Additions causing problems
118754
Package dependencies cannot be resolved
109277
Can't Add ppa:x2go/stable