An Error when user logs in Joomla site

Hello, I installed Joomdle both in my Joomla site and Moodle. All things in system check in Joomla site is ok. but when I login to Joomla site it gives this error: Ajax request failed.
And in browser console this error:
Access to XMLHttpRequest at ' lms.myjoomlasite.com/auth/joomdle/land.p...te_user=0&wantsurl=/ ' (redirected from ' www.myjoomlasite.com/ ') from origin ' www.myjoomlasite.com ' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: Redirect is not allowed for a preflight request.

I installed the Moodle in subdomain of Joomla site, like this:
Joomla site: www.myjoomlasite.com
Moodle: lms.myjoomlasite.com

Screenshot: filebin.net/d3dczcf96iyzms61/Joomdle__System_check.png

Hi.

I have never seen that message.... you can try changing the redirect-less SSO option in Joomdle config in Joomla, to see if that helps.

Hi.

When I set redirect-less SSO option to yes, user logs in to Joomla site without error but he doesn't login in to Moodle.

Sorry, I didn't notice that you are running Joomla and Moodle on different domains. Redirect-less SSO won't work across multiple domains due to security restrictions.

If that is possible, you can change your Moodle to be at yourjoomlasite.com/lms instead of using a subdomain.

As for the CORS errors with normal redirect based SSO: I don't know why this happens at your site, as nobody has reported something similar before...