I was having the same issue with it crashing at line 639 on the functions php:
$up_paratheme_input_fields_meta = get_option( 'up_paratheme_input_fields_meta' );
foreach ($up_paratheme_input_fields_meta as $value) {
can’t foreach over $up_paratheme_input_fields_meta because get_option returns null because it hasn’t been populated the first time. You need to make the plugin populate the fields on install
