Please use branch release7 for ILIAS 7, 6 and 5.4. Install it with git clone -b release7 --single-branch https://github.com/internetlehrer/MultiVc MultiVc.
Please use branch release8 for ILIAS 8 (and higher). Install it with git clone -b release8 --single-branch https://github.com/internetlehrer/MultiVc MultiVc.