You may not notice but the Teachable share URL is different to the sales Page URL. So if you have a problem with the Facebook share image you may have to debug it in two places.
Facebook Debugger Link: developers.facebook.com/tools/debug/
My Teachable Training Category In My Forum For More Videos:
My Teachable Affiliate Link: TE.PNUK.CO
Join the discussion about this video and more on my forum: PaulNicholson.com