In the css you need to add
.uou-block-7a .css-table-cell {height: 100%;}
You should give this fix to author of the plugin to make an update. Because I’m afraid they will not see this post here 
In the css you need to add
.uou-block-7a .css-table-cell {height: 100%;}
You should give this fix to author of the plugin to make an update. Because I’m afraid they will not see this post here