I have tracked the issue to the memaker.ui file, the IDs of your GUI components are not unique within the file. This is causing GTK to though a tantrum. Renaming the IDs to something else (possibly more related to the job of the UI element (ie. image1 -> gtk-save-as-image) would probably fix this issue.
I have tracked the issue to the memaker.ui file, the IDs of your GUI components are not unique within the file. This is causing GTK to though a tantrum. Renaming the IDs to something else (possibly more related to the job of the UI element (ie. image1 -> gtk-save-as-image) would probably fix this issue.