fcolombo on "[Plugin: Testimonial Rotator] Removed archive page returns error 500"

I have used the filter for clearing out the testimonial archive ( https://halgatewood.com/docs/plugins/testimonial-rotator/removing-the-testimonial-archive-page ).

I have Polylang installed, and my permalink structure is:
www.domain.com/LANGUAGE-TAG/slug/

My removed /testimonials/ archive page returns a 500 error page. Could this be a conflict with Polylang?

https://wordpress.org/plugins/testimonial-rotator/