How to disable SSL checking on Nginx?

I have some QA server for my website.
A year ago I’ve tried to make SSL connection to my production website so I’ve implemented it on the QA by nginx too.

Now it’s expired and I don’t want to renew it on the QA.

How can I do it without removing Nginx.
I’ve tried some things that I’ve googled but I didn’t find something good.

It’s still demanding the SSL checking, and this is the error that I’m getting when I’ve tried to load it:

    main.9b8be0e9.chunk.js:1 Mixed Content: The page at '' was loaded over HTTPS, but requested an insecure resource ''. This request has been blocked; the content must be served over HTTPS.

The nginx start of configuration…

server {

listen 80;
#some trying
ssl_protocols TLSv1.2 TLSv1.1 TLSv1;

#I remove the s from the https...
return 301$request_uri;


I also have listeners on the port of the server and 443

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