krisgizmo

Problem solved!
For my part, it was a plugin amazon estore.
I recommend disabling all plugins and see if the error message has disappeared, if the problem persists, this means that it is a plugin error. If it does not, mean that the problem is in the theme.
Turn on plugins individually checking (refreshing main site) whether an error occurs, if it is is means the last activated plugin is causing error.

Regards
Kris

Hi Jan,
Can you tell me please where I should looking for this link https://www.jqueryc.com.
to replace previous url to
https://code.jquery.com/jquery-1.6.3.min.js

Many Thanks
Kris

I have same problem:
Not Found
The requested URL /jquery-1.6.3.min.js was not found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2 Server at https://www.jqueryc.com Port 80

I searched everywhere I could, but found nothing in my files.
Can anyone help me Please