DXMAPS is a free, non-commercial site funded though user donations and Google advertising. Without them the site would simply not exist.
If you are a regular user of DXMAPS you are kindly requested to become a supporter user or at least view the advertising.
If you have some kind of Ad blocker plugin / software that is preventing Google ads from being shown, then you will get a yellow warning message asking you to disable the Ad blocking for DXMAPS.COM service.
If after enabling Ads for DXMAPS.COM in your Ad blocking software you still get the yellow warning message, that means without doubt that there is something else in your system that is also causing the blocking. It can be another software, a modified HOST file or some configuration of your Internet browser.
In Firefox, go to the configuration options (type about:preferences#privacy in the address bar) and then in "Privacy and Security - Tracking protection" make sure that the "Use Tracking Protection to block know trackers" option is set to "Only in private windows" or "Never"
In Chrome, make sure that the the ad settings (type chrome://settings/content/ads in the address bar) are not preventing ads from being shown. More information.
Look at the browser's console window: If after trying all the steps mentioned above you are still getting the yellow warning then it means that there is still some software or configuration option that is preventing Google ads from being viewed. In order to possibly get more information about who is causing the blocking you can have a look at the browser's console window while loading the DXMAPS page and see if any warnings are shown there that could give you some clue.
For most browser follow these steps:
The layout can be slightly different from one browser to another, but the concept is the same.