I had to reinstall the theme several times on WP Engine where constantly something is either broken or missing on the installed theme. Not sure if it is WPengine related or not, but still trying to get it working. Now have received the error on the activation which is all for the single and same project/site.
And since I’m unable to finish with the installation, the domain is still a temporary one, like:
https://usairc.wpengine.com
https://usaircomp.wpengine.com
https://usaircom.wpengine.com
etc