# do a fresh SVN checkout
# try installing In-Portal by going to /core/install.php script and confirm that Composer-related error is immediately shown
# install dependencies and confirm that after reloading a page Composer-related error is gone
# complete In-Portal installation and verify that Front-End and Admin Console are working
# delete the "/vendor" folder and confirm that Front-End and Admin Console both stopped working and Composer-related error is shown
# install dependencies and confirm that Front-End and Admin Console both are working again