How to fix TCF error 7.8 in AdSense? “EU user consent” – What is it?

Recently, many publishers using the Google AdSense platform have noticed the appearance of a message regarding error 7.8 – Concerning User Consent from the EU. This issue may also affect you. Find out how to check if you have this problem and what to do to fix it.

TCF Error 7.8 “EU User Consent” – How to check the error code?

The first step in identifying the error in AdSense is to analyze the report related to user consent from the EU. Make sure the error code is 7.8. You can do this in two ways below:

Method 1:

To do this, follow the steps below:

  1. Log in to your AdSense account.
  2. Go to the “Brand Safety” section.
  3. Then click on “Content” and select “Blocking Controls.”
  4. Find the widget named “EU user consent” and click on “Manage EU user consent.”
  5. Next, click the button “Download TCF error report”

Method 2:

If you see an error message on the AdSense home page:

TCF error 7.8 We've detected an issue on your IAB TC string on one or more of your sites or apps. These errors may affect your ability to serve ads to European users. A detailed report is available for you on the EU user consent page.

We’ve detected an issue on your IAB TC string on one or more of your sites or apps. These errors may affect your ability to serve ads to European users. A detailed report is available for you on the EU user consent page.

  1. Click on the “Go to EU User Consent” button
  2. Then click the button “Download TCF error report”

EU user consent tcf 7.8

Analysis of the AdSense report from “EU User Consent.”

Open the file in CSV format. The beginning of the file name is iab_tcf_errors_(…).csv

TCF error 7.8 AdSense - CMP

In column C there is an error code. In this case, it is error 7.8.

This means that:

TC string version field is neither 1 nor 2.

Suggested action from Google:

Only limited ads will be served. CMP should fix the TC string implementation errors.

TC string version field is neither 1 nor 2

Check other error codes.

How to fix error TCF 7.8 in AdSense?

Google has announced that it will actively address issues with error codes starting from 7.X, including error 7.8. However, limitations in ad display may arise. This concerns individuals using Google’s Consent Management Platform (CMP). Therefore, if you notice error 7.8 in AdSense, await further instructions from Google. Typically, the message should disappear on its own once the issue is resolved from their end.

It is advisable to regularly monitor the AdSense dashboard to stay updated on any changes and communications from Google regarding errors and updates within the AdSense system.

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  1. Yuxiang Zhai says:

    Thank you! I found this problem yesterday and this artical helps!

  2. Hello Charles

    We use the free version of for cmp, but the last days we face the AdSense’s issue on our IAB TC string.

    Error code 7.8 for 2 ad units.

    We replaced the ad units yesterday but the error still exists.

    Is there something wrong with clickio and we should switch to AdSense CMP?

    Can you help us?

    Thanks & Regards

    1. Hi,
      The problem is with Google. Your CMP from AdSense is OK.

  3. Hi Charles,
    where can I find the announcement, that Google will fix it?
    Best regards

  4. An excellent guide for tackling TCF Error 78 in AdSense. The comprehensive approach and detailed instructions make it a go-to resource for publishers encountering this issue.

  5. This article helped me quickly diagnose and resolve TCF Error 78 on my website. The explanations are straightforward, making it accessible even for those new to AdSense.

  6. As someone who struggled with TCF Error 78, I can attest to the effectiveness of the solutions provided in this article. Thank you for saving me hours of troubleshooting!

  7. I appreciate the emphasis on understanding the underlying causes of TCF Error 78 and how to address them. This article goes beyond just fixing the issue and helps publishers prevent it in the future.

  8. This article is a valuable resource for anyone encountering TCF Error 78 in AdSense. The step-by-step instructions and troubleshooting tips are incredibly helpful in resolving the issue.

  9. I appreciate the thorough explanations and screenshots provided in this article. They make it much easier to identify and address TCF Error 78 issues effectively.

  10. A lifesaver! TCF Error 78 can be perplexing, but this article breaks down the troubleshooting process in a way that’s easy to follow and understand. Highly recommended for AdSense publishers.

  11. Thank you for providing a detailed guide on resolving TCF Error 78 in AdSense. This article saved me a lot of time and frustration by offering clear steps to troubleshoot the issue.

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