get_row_layout returning empty string

In regards to Field Types -> Flexible Content:

• The flexible content object is missing value.
• The function to check the content type get_row_layout() returns an empty string.
• The function is looking for the field called acf_fc_layout
• plugins/advanced-custom-fields-pro/api/api-template.php line 906

Usage:
if( get_row_layout() == 'table' )

https://ww.wp.xz.cn/plugins/advanced-custom-fields-table-field/