lithiumlab

I can confirm this.
When adding fields to the checkout the order can not be placed.

I found the problem on this.
on file:
/wp-content/plugins/page-transition/class-page-transition.php
on line 397 where it says:

:not([class="no-animation"])

changing to this did the trick:

:not(.no-animation)

im having the same issue.
any suggestions?