Problem & Solution options : button_image not working

There is an issue with the button_image that it doesn’t work when jquery is loaded in footer.

Workaround: Load jquery in header Or load the code manually in footer.php (ref: main.php Line: 323 onwards)

Possible Solution: Update plugin to load a js file with dependency on jquery. Add the code (ref: main.php Line: 323 onwards) to js file and define a js variable here. Use the newly defined variable to apply image when supplied.

My 2 cents