Why is JSON on the server always 403?

Question

Nginx

I am making a PWA for the store, everything works, thank God, and all that remains is to upload assetlinks.json to the server in the .well-known folder in the root of the site.
I check via https://developers.google.com/digital-asset-links/... . Writes that No app deep linking permission found. I check the file through the browser - 403 error.
Permissions: 755 per folder and 644 per file. The entire site is available. Renamed the extension to JS - the file opened.
Server on nginx 1.20.2
By the way, the file is released from the site root normally