Fatal error: Uncaught Error: Class ‘Caldera_Forms_Sync_Factory’

1.5.2 just throws out the following error when I preview the form. Adding it to a page doesn’t work (endless green loop) and the modal click from before is not working as well:

Fatal error: Uncaught Error: Class ‘Caldera_Forms_Sync_Factory’ not found in /www/htdocs/#############/wp-content/plugins/caldera-forms/fields/html/field.php:4 Stack trace: #0 /www/htdocs/#############/wp-content/plugins/caldera-forms/classes/core.php(3873): include() #1 /www/htdocs/#############/wp-content/plugins/caldera-forms/classes/core.php(4308): Caldera_Forms::render_field(Array, Array, Array, Array) #2 /www/htdocs/#############/wp-content/plugins/caldera-forms/classes/core.php(4681): Caldera_Forms::render_form(Array) #3 /www/htdocs/#############/wp-includes/shortcodes.php(345): Caldera_Forms->shortcode_handler(Array, ”, ‘caldera_form’) #4 [internal function]: do_shortcode_tag(Array) #5 /www/htdocs/#############/wp-includes/shortcodes.php(223): preg_replace_callback(‘/\\[(\\[?)(calder…’, ‘do_shortcode_ta…’, ‘[caldera_form i…’) #6 /www/htdocs/#############/wp-includes/class-wp-hook.php(298): in /www/htdocs/#############/wp-content/plugins/caldera-forms/fields/html/field.php on line 4