by 浅野 真之.
Mr Kenwhat I was NOT able to understand happened in my moodle.
As a result, My problem was resolved.
I could launch LTI formatted data from my moodle 3.2.2+ server to tool provider's server.
[What I did]
I added the code into course/modlib.php (106～108).
<the code>
if(!isset($transaction)){
echo "<script>alert('invalid_error!');</script>";
}
Why did my moodle moved by the code to alert???