GX-Entwicklung

When converting the old shop (v3.4.0.0) with settings.json available. It will wrongly convert font-family fields into textbox in StyleEdit4 which cause the error:

"[CSS compile error] 'array_merge() expects at least 1 parameter, 0 given' in /var/www/html/ctools/shops/musik-mohr-tb/system/core/GoogleFontManager.inc.php:244 [CSS compile error] 'array_unique() expects parameter 1 to be array, null given' in /var/www/html/ctools/shops/musik-mohr-tb/system/core/GoogleFontManager.inc.php:244 [CSS compile error] 'Invalid argument supplied for foreach()' in /var/www/html/ctools/shops/musik-mohr-tb/system/core/GoogleFontManager.inc.php:147 "

http://musik-mohr-tb.custom.gambio-se...er.net/de/
v3.4.0.0 -> v4.5.1.0

Steps:

1. install v3.4.0.0 shop
2. go to StyleEdit 3 and create a new style
3. upgrade to v4.5.1.0 by using KU package

Expected:
Shop updated without any problems.

Actual:
Shop has an error in top of the page.