Make sure that the code is there. Is the code is there then the problem is that the ad needs more time to display. Usually when you create a new ad it takes some hours until google show something on it.
ok. I have tried to insert Google Ads via admin panel, but still no any results. Perhaps, you tell me where and how can i insert this code into the site page?
Hard to tell without testing. Send me admin access to inbox@chevereto.com to try to see what's going on.
By the way, some hosting companies blocks any text matching <script> when you submit a form. You will need to manually inject the ads into the chv_settings table or refer to your hosting company about it.
You will need to ask them for further assistance because it seems that you won't be able to save anything which has <script> on the body. In this case hostgator isn't working properly for Chevereto. Maybe you added some custom setting on your own or the default server settings has some restrictions, anyway, you will need to refer the issue to them.