This article is specifically on error or notification on your Google AdSense dashboard which says “You have ad crawler errors, which can result in lost revenue”.

How to Fix Google AdSense Crawler Issues?
The most common one and which we have in above image is for page not found also known as error 404.
We do have a solution for AdSense crawler issues which states page not found error.
First of all, we need to verify which URL is affected.
To do so, follow below steps:
Step 1. Click on the Action button as shown in the notification. Alternatively, you may click on Account from the left pane and select Policy Centre
- This will show results on the right side.
- Here in, under Sites with issues, you will see the website affected page or URL. Click on the result to deep dive in.

Step 2. Now you will see page issues. For instance, in our case, Type of issue: Crawler: Page not found
and there is one affected page with URL example.com/download-office…%E2%80%8B

What we have found so far is that Google Crawler doesn’t find this particular page or URL in this website (Crawler: Page not found).
The reason could be any, such as, either page doesn’t exist or never exist, page or URL may be deleted, the URL may be changed, etc.
To check and confirm, you can copy this URL and open it in a new tab of any web browser and paste it there then, hit Enter.
Most probably. It comes with “Oops! That page cannot be found” Or “Error 404” which is similar.
This clearly means, this page or URL doesn’t exist in the website, hence AdSense is throwing ad crawler errors.
How to Fix “You have ad crawler errors, which can result in lost revenue”?
In order to fix or resolve Google AdSense error “You have ad crawler errors, which can result in lost revenue”, we need to stop Google Crawler to check this URL.
Thinking??, how we can do it?
This can be done from Google Search Console wherein; your site property is added to crawl.
Now, the rest of the steps we need to do it on Google Search Console.
Login to Google Search Console
Note: Make sure you have copied that URL. For example: in our case it is example.com/download-office…%E2%80%8B
- From the left side pane, click Removals
- Click NEW REQUEST button from the right.

New Request page will open on your screen. Follow below steps now:
- Select the CLEAR CACHED URL tab
- Paste the URL that we have already copied above
- Select “Remove this URL only” not the other one
- Lastly, click Next to finish the process.

The moment you are done with above all steps. You are free to click on Dismiss option shown in the notification.
As a result, next time when a Google Crawler runs on your site (usually one or two days or in a few days), that URL won’t be found in crawler error.
Certainly, Google AdSense notification of you have ad crawler errors, which can result in lost revenue will be gone.
Note: For me, that notification go away automatically after 3 days. Duration may vary in your case.