jquery joomla error. How to fix?

Question

PHP

Hello everyone, I'm dragging a site on joomla.
Generally trouble.
Everything has been transferred, the data has been transferred, it is displayed in the components, but alas, not all tabs are displayed.
There is only one error in the console.
jquery.min.js:1 '//@ sourceURL' and '//@ sourceMappingURL' are deprecated, please use '//# sourceURL=' and '//# sourceMappingURL=' instead.
eliminated the rest.
Just where the buttons should be in the admin panel, they are not there, the installer still does not work for some reason.
Everything else is clear. From the frontend side, everything is perfect. Everything opens, forms are sent ...
Please advise.

Answer 1

This is not a bug, but a warning about deprecated functionality.
You can generally remove the mentioned line in production, or you can simply edit it - it’s still written to you in the message.