io->writeError('Installation of typo3/cms is not possible any more for TYPO3 versions 9.0.0 and higher.'); $this->io->writeError('Please require typo3/minimal instead for minimum required TYPO3 system extensions,'); $this->io->writeError('and/or require individual system extensions like typo3/cms-extension-name'); $this->io->writeError('E.g. composer require typo3/cms-tstemplate'); throw new \RuntimeException('Installation stopped.', 1513083851); } }