I believe the minimum requirement for AEM SPA Project Archetype is:AEM
6.4.7+ or 6.5.3+ Check this link:
https://github.com/adobe/aem-spa-project-archetype
@Vikky - Try using filevault in Intellij which we get it as part of 6.x
quickstart.I have mentioned the whole process of setting it up in my
article IntelliJ with AEM