This error occurs because the robots.txt file on the site is preventing Google from crawling some pages. This file tells search engines whether or not they can enter the website. In this case, this file is blocking the access, preventing the Google Ads system from automatically reviewing your ads and website, and causing the error disapproval.
Step-by-step to solve this problem:
1. Verify ownership of the site
First, use a tool called Search Console to verify ownership of your site. If your property is already verified in Search Console, skip to step number 2.
Click here to find out how to verify your site. If you are unsure how to do this check, please contact your programmer so that he can help you with this setup.
2. Test Robots.txt
Now that your site is verified in Search Console, let's test the robots.txt file:
In Search Console, there's a menu called Tracking on the left side of the screen. Within this menu, there's a submenu called Test robots.txt
If your website is blocking (Disallow) Google's access, there'll be a warning in red claiming it's "Blocked".
3. Edit Robots.txt to allow Google access
If your site is blocked from Google access, you just need to change your robots.txt file to “Allow: /”. It should look like this:
This way, we will be allowing Google to access your site.
Change the file on your server. If you are unsure of how to do this, contact the website developer and use the article on how to create a robots.txt file as a basis.
4. Submit Robots.txt for verification
Now you just need to send the new robots.txt file to Google to check again:
You will access the Webmaster Tool again, from the Test robots.txt menu;
It should now have a green "Allowed" button;
Now click on the "Submit" button just above “Allowed”;
Try step 3 again, asking Google to update;
The following message should be received: "Sent. Refresh the test page next to confirm the timestamp. ”
5. All set!
After concluding the steps above, Google's crawlers will scan your site and your ads may start running again. If necessary, request a new review through the Ads platform.
Supplemental information can be found in the link below: