typelib-1_0-Atk-1_0 from LibreOffice:Factory project
Select Your Operating System
Add repository and install manually
For SLE 12 SP5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/LibreOffice:Factory/SLE_12_SP5/LibreOffice:Factory.repo zypper refresh zypper install typelib-1_0-Atk-1_0