I have a problem with one of my standalone written moodle plugin after upgrading from Moodle 3.3.2 into 3.4.x (versions 3.4.1 and 3.4.2). The only information which appears in the debugging console in the browser is:
moodle-core-event: Global event published: FORM_ERROR yui_combo.php?rollup/3.17.2/yui-moodlesimple.js:5828
moodle-core-event: Global event published: BLOCK_CONTENT_UPDATED
I assume that the problem may lay in the update of jquery from 3.1.0 in the Moodle (3.3.2) into 3.2.1 (3.4.x). Or maybe someone has another idea where to start to search for the problem/solution?