libgtk-x11-2.0.so.0 ERROR

Hello,
Since last week I can’t run inkscape or firefox anymore. I don’t know what I did to cause this. I only allowed updates to be installed. when I try to run inkscape on the command line I get this error:

 ~> inkscape 
inkscape: symbol lookup error: /usr/lib/libgtk-x11-2.0.so.0: undefined symbol: gdk_pixbuf_get_formats 

I reinstalled gtk, inkscape and firefox but it did not work.
Anyone knows how to solve this.
thanks in advance.

Hello try to install this library
Open your terminal and write

su
# zypper install libgtk-x11-2.0.so.0

I reinstalled the libgtk-2_0-0 lib but it still doesn’t work.
thank you anyway.