Hi Sakis,
hope you´re fine!
I´ve updated a clientsite to Yootheme Pro 5. I also use JF 1.21.4 and that breaks the site as when i disable all that JF Files, the site loads normally.
The Error is: 0 Class "YOOtheme\Builder\Joomla\Fields\FieldsHelper" not found
Im also refering to https://yootheme.com/support/question/172824
Can you help?
Thanks,
Dennis