Error in Avia Framework

Hi There,

I was trying to clone my wp installation from my webserver to a local test environment. So that I can test new Template Versions of Enfold there. I tried the Duplicate Plugin to clone my wp installation on my webserver. The Version on my Webserver is working fine. I get the following error message if the Debug mode of wordpress is on:

Notice: Undefined offset: 2 in C:\xampp\htdocs\wp\wp-content\themes\enfold\framework\php\function-set-avia-backend.php on line 398

on line 398 is the following code: $rgba[2] * $rgba[2] * 0.068);

If I activate another Template, there is no such error. Only with Enfold.

Can you help?

Best,
Marcel