Hi i got this message after installing the plugins :
Your license key doesn’t match your current domain. This is most likely due to a change in the domain URL of your site (including HTTPS/SSL migration). Please deactivate the license and then reactivate it again.
About issue: “License Invalid”, We bought an extended license to be able include it in our theme, and we own only one license key (as well as in case with single license), theme buyers are not allowed to use that key. But, don’t worry, Plugin Elementor Pro still working in your site.
To update new version, please deactive current plugin, download new plugin at http://source.wpopal.com/plugins/new/elementor-pro-3.x.zip and re-install.