Milan Golubovi?

Same goes for Post Thumbnail Editor. And for it this fix helped me:

In \post-thumbnail-editor\js\snippets\pte_enable_media.ja on line 19, change this:

"\n</a>", {id:"{{ data.id }}"});

To this:
"\n</a>")({id:"{{ data.id }}"});

Thanks RVoodoo for your reply,

Yes, I added theme support and I can upload thumbnail for every page. That works fine.

But “the_post_thumbnail()” is not outputting anything?
I’m just putting that function call in header template (because every page have some picture) at place where I want page photo to appears – is that enough?
Do I have to put it inside of some kind of loop? I mean I’m showing one page in a time and I got one thumbnail for a page, so I don’t understand what can I loop here?

Got exactly same problem.
WP docs say that thumbnails can be enabled for post and/or for pages(!):

https://codex.www.ads-software.com/Function_Reference/add_theme_support#Post_Thumbnails

But only there. On all other places only posts are mentioned ?!?

Also, when I enable thumbnails for pages I can select one for every page.
It works well in admin part. But in template I can’t picture I uploaded with the_post_thumbnail() ?!?
Also for that function docs says that it must be inside loop?!? Why if I’m using thumbnail attached to page, not to post.

I’m new to WP, but constantly I’m finding some illogical docs, examples…

Please, help, advice.