Those all OCR engines are installed by default only from official UiPath Packages. I think that the installation of your studio might be somehow broken. Maybe try to reinstall it based on this instruction:
ashokkarale
Anil_G
Yoichi
yangyq10
postwick
chandreshsinh.jadeja
aravindbalineni123
Parvathy
aya
PRASHANT_GABHANE