I gotten this error using MB Testimonials, it is showing in the console log https://prnt.sc/ITkLFT8pyiop, deactivating MB Testimonials Plugin the error gotten away. Based on the console log it seems like there is a blocking on the SVG. May I know how can I solve this?
Do you add some custom SVG images to the testimonial item? If yes, please share some screenshots of the testimonial. I do not see that issue on my demo site.
You can also check the WP debug to see if there is any error log and share it here.
JPEG image was applied to the author image (https://prnt.sc/SDiSdP0TmkmL) not SVG. But in the console log it shows the 403 error (https://prnt.sc/HC5K_v7pQooX) for SVG. Author image is not using SVG but JPEG but not sure why the error shows
Can you please share your site URL where I can see the issue? It looks related to the arrow next/prev of the slider. You can try to disable the arrow or use the custom arrow and check this issue again.