Hustle Custom Content Pops-up "Behind" Website Content

Hello, Im currently using the Kendall Theme and wanted to test out the Hustle pop up plug-in. I use the email opt-in and it works perfectly however when when I used the Custom Content option I notice that it works however it loads behind my page content. This theme also uses Visual Composure. I've attached a picture to help explain my issue. Its a screenshot from my phone, however this is an issue on the desktop as well. Thank You for your help.