Euro-sign problem, no display of € on single product page

I have a strange problem, probably UTF-8, but tried all known solutions by now.
The euro-sign on my single products is not showing up.
I know that I can use the € instead on the product, but it is working on the original site, which I need to move to another server, so copied all content, database, did search/replace, and have the 2 sites identical, except for the € sign, and this only on the single-product page.

Original working: https://ro-ni.nl/shop/sp-gopro-remote-pole-39-inch/
Moved not working: https://mayak.nazwa.pl/roni_test/shop/sp-gopro-remote-pole-39-inch/

What I did so far:
-Added <meta charset=”utf-8″ /> to the header
-Added @charset “UTF-8”;
-Checked the database: all collation is set to utf8_unicode_ci

Why I did not change the € to € on the products is because the option dropdown (Kies een optie) is going to the last blank option when changing the name of the attributes (think a bug..).
The drop-down list is still there, but no ‘Kies een optie’ will appear anymore, and you need to redo the full list in order to get this back to normal.

I spent many hours on this already without avail, and since it works on the original I thought maybe someone could point me in the right direction..

Many thanks already,
Heyme