A new version of the Qt 5.15 series was just released, version 5.15.1, with over 400 bugs fixes and improvments. As the 5.15 is an LTS branch no new features are added anymore. The current Raspberry Pi Qt guide consentrates on the previous LTS release, 5.12, and as so is getting quite old even if the instructions should work with 5.15 as is. The article will be updated for 5.15.1 as soon as we have checked, tested and ammended any issues found.