Limited Time Offer! For Less Than the Cost of a Starbucks Coffee, Access All DevOpsSchool Videos on YouTube Unlimitedly. Master DevOps, SRE, DevSecOps Skills! Enroll Now Make sure you are in htdocs folder while executing the commands. I was trying to install Laravel in a Ubuntu virtual machine and got this error Your requirements could not be resolved to an installable set of packages. Problem 1 – phpunit/phpunit[7.5.0, …, 7.5.20] require ext-dom * -> it is missing from your system.