”Dear support
I have contacted the Elementor Pro support and they gave me a step by step troubleshooting guide.
After doing the initial steps of clearing the CSS and cache, they suggested switching to the Hello Elementor theme … which made Elementor Pro work perfectly without any errors.
As soon as I switched back to the Xstore theme, the Elementor Pro error message came back.
It therefore seems that my current Xstore version / configuration is causing the problem and I hope you can help solving it.”