Structured data mark up tool issue 
Autor: Derek K.
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I am trying to use the Google data mark up tool and get this message. 
I have tried Edge, Google and Firefox and get the same message. Is there code within webex that prevents me from using the Google mark up tool. Suggestions most welcome. By the way it doesn't matter which URL I use the message is always the same.
Gepostet am
Hello.This is a known situation (https://helpcenter.websitex5.com/de/post/210675). But I do not know if there is a solution for it.
Autor
Hi Aleksej,
My view is that this is a websiteX5 issue as the tool works fine on all other websites such as Wordplus, Drupal etc..
Hi, if you don't want to see that alert message you need to enter the following code string at STEP 1 / Advanced / Statistics, SEO and Code / Code / Custom Code / before closing the HEAD Tag:
<style>
.browser-comp-message.severity-error {
display: none;
}
</style>
"My view is that this is a websiteX5 issue" - Yes, I think so too.