Problem with a code not generated by Shopify

[CurrentsGallery]

Currents Gallery's Website has been working well for years.  All of a sudden a slideshow that was created on the homepage through use of the editor stopped working properly.  The slideshow is intermittently visible on the editor page and on the live page.  I am not satisfied with the answers I get from the Shopify Theme specialist.  Apparently he found the problem code, a screen print of which I've attached here, but says he can't delete or fix the code.  I have to pay for that service.  I have added apps through the Shopify store, but never make code changes myself.  Currents is a small art gallery operated by  7 elderly women on a volunteer basis.  We cannot afford more than what we are paying for this technology.  Please help.