Standalone fix for PR-9621 to validate proposed solution.
$ cd ${DIR_MAGE_ROOT}
$ composer require flancer32/mage2_fix_pr9621
$ bin/magento module:enable Flancer32_FixPr9621
$ bin/magento setup:upgrade
$ bin/magento setup:static-content:deploy
$ bin/magento cache:cleanYou need an authentication keys for https://repo.magento.com/ to uninstall any Magento 2 module. Go to your Magento Connect account, section (My Account / Connect / Developer / Secure Keys) and generate pair of keys to connect to Magento 2 repository. Then place composer authentication file auth.json besides your composer.json as described here and put your authentication keys for https://repo.magento.com/ into the authentication file:
{
"http-basic": {
"repo.magento.com": {
"username": "...",
"password": "..."
}
}
}Then run these commands to completely uninstall Flancer32_FixPr9621 module:
$ cd ${DIR_MAGE_ROOT}
$ bin/magento module:uninstall Flancer32_FixPr9621
$ bin/magento setup:upgrade
$ bin/magento setup:di:compile
$ bin/magento setup:static-content:deploy
$ bin/magento cache:cleanBe patient, uninstall process (bin/magento module:uninstall ...) takes about 2-4 minutes. Remove auth.json file at the end:
$ rm ./auth.json