V3.9 Too many redirects error

V3.9 Too many redirects on my website (extranet.lawnmaster.co.uk). SSL certificate installed on server. 'Force SSL for all site pages' ticked fine, but when I tick SSL enabled under store setting I get 'ERR_TOO_MANY_REDIRECTS' and have to change it back in the database. SecureURL option filled in fine.

In the web.config file. I've tried uncommenting 'Use_HTTP_CLUSTER_HTTPS' and 'Use_HTTP_X_FORWARDED_PROTO' to no avail.

Tried adding a redirect rule I found on another forum. No luck there either.

<rewrite>
  <rules>
    <clear />
    <rule name="Redirect to https" stopProcessing="true">
      <match url=".*" />
      <conditions>
        <add input="{HTTPS}" pattern="off" ignoreCase="true" />
      </conditions>
      <action type="Redirect" url="https://{HTTP_HOST}{REQUEST_URI}" redirectType="Permanent" appendQueryString="false" />
    </rule>
  </rules>
</rewrite>

Ran out of ideas of what I can try to resolve the issue. Unable to find any other options from other forums.

Any help / suggestions would be greatly appreciated.

Thanks,
Rhys.

In Admin > Stores, check your URL  (should now be https://yourstore.com/  )
Try an Incognito browser.  If it works OK there, then clear your browser cookies.

Hi,

I already have https:// under store url and secure url. Tried incognito and clearing cache/ cookies to no avail.