Recently, I believe after switching to WP 5, non admin users are randomly getting the following error when previewing a post:
“The link you followed has expired” . Please try again
I am suspecting this is due to some conflicts with the theme or some plugins. Unfortunately the theme is not supported. I am aware that it would be wise to switch to a supported theme, but in the meanwhile, where should I start investigating? This similar post, points out some trouble with nonces…