No preview or Shortcode

I can’t get the preview or shortcode to generate in the back end.

as suggested elsewhere:

Have tested the Aftereffects output files and they are fine.
Have tried the option on export to output the old .json format
Have replaced the lottie.js and lottie.min.js files in the database
Have edits the wp-bodymovin.php file to point to the latest version (after seeing the support thread before this one)
Have tried disabling Elementor / Elementor Pro in case it was that.

Still no preview or shortcode