Plugin not works

Hi.

The plugin not works for my website. I also using the Flying Pages plugin.

on Flying Pages plugin I got the message:

Cache-Control Check
? "no-store" is found in your Cache-Control response header. Please contact your hosting provider to remove this.

Current Cache-Control: no-store, no-cache, must-revalidate
Suggested Cache-Control: no-cache, must-revalidate, max-age=0

So, the hosting and I didn’t find how to remove this, so I added to .htaccess this code:

Header always set Cache-Control: "no-cache, must-revalidate, max-age=0"

Now, I added to Flying Scripts plugin this scripts:

gtm.js
adsbygoogle.js
api.js

and it doesn’t work – on GTmertix I see same result.

My htaccess file also icludes the “Leverage browser caching” code and the “Enable compression” code.

Note that this work ok on my another website.

I think the problem related to the Cache-Control, but I don’t sure.
I also not a developer, just have basic information.

Please help.