apply link missing

I have the same issue. I have noticed an earlier post with the same issue saying that the job must go through a validation process with Indeed before the button can appear. But the moment, the Chrome broswer returns an error ‘Failed to execute ‘postMessage’ on ‘DOMWindow’: The target origin provided (‘https://apply.indeed.com’) does not match the recipient window’s origin https://stpiusx.co.uk/’).

The full link for example is https://stpiusx.co.uk/indeed-jobs/0ebc7325c6e128d9bfe9/administration-assistant/.