@luceos i opend before a thread in support area where i explain what i did:
https://discuss.flarum.org/d/26559-flarum-embed-404-page-not-found-issue
IN SHORT: i installed before flarum with some extensions, and everything with other extension is perfectly working. So i tried to install FLARUM / EMBED and resulted in 404 page not found. As per @clarkwinkelmann suggestion i set on cofig DEBUG mode and as he suggested was probable issue with an extension. So i disabled all extension excepr core extensions, and the DEBUG error gone away but right now i dont have any debug error but a simple white page with "s" char inside. I jave no idea what is the cause of this. After this so i reenabled al lextension. The debug continue to not provide anymore errors, but i stil lcontinue to see this "s" when i try to visit an embed url. So i have no idea what and where is the problem also because as per @clarkwinkelmann suggestion HTTP status is 200 so there is no any HTTP error.
Any help fix or suggestion of what i could try more or information about who i can pay to fix will be helpfull !
Thanks
