Timestamps issue (not synchronized)

Hello there!

I’m facing a problem since yesterday that I can’t resolve. Apparently, timestamps doesn’t match this is the shown issue:

<strong>The pages do not match! Timestamps are different or not found!</strong>

<em>Things you can do:</em>

1. Load your homepage in a browser in private mode and check the timestamp at the end of the HTML source code. Then refresh the page and compare the timestamp. Caching works if the timestamps are identical.

---> I checked, I "refreshed" the page but nothing is happening because the timestamp is wrong, I don't get that point

2. Allow logging in the debug page. This should help you identify the problem.
You should check the errors listed on pages 1 and 2 above. Your local server configuration may not allow your site to access itself.

—> I checked degug page but nothing is showing I don’t get what to do

3. You should check the errors listed on pages 1 and 2 above. Your local server configuration may not allow your site to access itself.

Can you please, help me? Thank a lot if you do. I’m so lost