the block shows the following error message:

A Moodle error occurred:
Unsupported redirect detected, script execution terminated
Debug info:
null
Stacktrace:

• line 2255 of /lib/weblib.php: moodle_exception thrown * line 2681 of /lib/moodlelib.php: call to redirect() * line 42 of /blocks/ajax_marking/actions/ajax_nodes.php: call to require_login()

i used the admin function "login as". But i don't know if this is the cause

ajax marking block version is 2.2.0b7