FranH

quick fix:

in folder “wp-content\plugins\front-end-editor\editor\”
rename “editor.js” to “editor.min.js” (or something else),
rename “editor.dev.js” to “editor.js”,
open “editor.js”,
find line 838
new fieldTypes[type]($el, type, filter, data)
and change it to

try {
    new fieldTypes[type]($el, type, filter, data);
}catch(err){;}

this should get the editor working.
(it worked for me, anyway.)

as far as i can tell, the error occurres if one item is rendered two times.

same thing here

the error happens only (afaik) in category listing.
individual post and page works fine.

beautifull plugin, btw ??