Step 1: Select the last option under the "position" setting in the bar configuration in the App, and save the change
Step 2: Go to Admin > Online Store > Themes
Step 3: Click the "..." button on the right hand side, and select "Edit HTML/CSS"
Step 4: Click "theme.liquid"
Step 5: find the line <div class="page-wrapper”>; Copy and paste "<div id="ctb_placeholder"></div>" below it in a new line
Step 6: Click "Save"
NOTE: Do NOT forget to select the last option under the "position" settings in the bar configuration in the App, and save the change