HAR Export > Iframe Vimeo Video 'then' Property Permission Denied

[gavk34]

I have a page that I am attempting to export the requests for. This page contains multiple videos(HTML5, Vimeo).

I have the API script, that is executed using Selenium, to export the HAR once all videos have finished playing.

har_script = "var options = {
      token: \"test\",
      fileName: \"#{file_name}\"
      };

      HAR.triggerExport(options).then(result => {

      });"

However when calling the above script after the Vimeo videos are playing I get the below error. This does not occur for the HTML5 videos.

Permission denied to access property "then" (Selenium::WebDriver::Error::JavascriptError)
[remote server] https:./player.vimeo.com/video/185300229 line 69 > Function:6:in anonymous' [remote server] https:./player.vimeo.com/video/185300229:69:in handleEvaluateEvent'

The Vimeo video is within an iframe, like so

<iframe src="https://player.vimeo.com/video/185300229" width="640" height="640" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
<p><a href="https://vimeo.com/185300229">Monkey Swinging Shadow Puppet with coloured acetates on overhead projector</a> from <a href="https://vimeo.com/user977287">amy lloyd-jones</a> on <a href="https://vimeo.com">Vimeo</a>.</p>

Interestingly comparing the error output and the html source the link is malformed, https://player.vimeo.com/video/185300229 vs https:./player.vimeo.com/video/185300229
Don't know if that is a cause or not