order received page redirecting problem

I do not know, I can only guess that the problem is caused by the theme.

When push the /place order/ button. Apparently nothing happens, but in the background the ordering is placed and the email is going out. But the /received-page/ not even try to load. So not directing to there.

I turned off almost all of the plugin to see if they are causing the conflict, but the problem is continuously present.

thank you
attila