Lectora courses crash on the user side

As a relatively new Lecora user with little knowledge of web programming, I have a question about the following Lectora/ILIAS problem:

I created a Lectora course that worked fine on my tests. After the export as SCROM 1.2 and integration into the ILIAS LMS some users (not all) report crashes of the course.

Sure, this can also be due to the configuration on the user side, but while testing the online (ILIAS) version I always get error messages in the debugging console during my tests in different browsers.

The following errors are thrown on each page (firefox debug):
TypeError: getComputedStyle(...) is null[Weitere Informationen]  mediaelement-and-player.js:462:5
mejs.MediaFeatures.init/t.supportsPointerEvents< https://lernwelt.fraunhofer.de/data/Test8/lm_data/lm_108818/mediaelement-and-player.js:462:5
mejs.MediaFeatures.init https://lernwelt.fraunhofer.de/data/Test8/lm_data/lm_108818/mediaelement-and-player.js:449:30
<anonym> https://lernwelt.fraunhofer.de/data/Test8/lm_data/lm_108818/mediaelement-and-player.js:579:1

SyntaxError: expected expression, got ','[Weitere Informationen]  trivantis.js:3919:92

The debugging console from Chrome throws these errors:
Uncaught SyntaxError: Unexpected token ,
setTimeout (async)
PreloadResources @ trivantis.js:3919
init12 @ page88563.html:175
init @ page88563.html:168
load (async)
(anonymous) @ page88563.html:143

Source-View
https://lernwelt.fraunhofer.de/ilias.php?baseClass=ilSAHSPresentationGUI&ref_id=8806
preload( 'images/progress31438_bar.png','images/progress31438.png','images/grauflaeche.png',,'images/box_check.png','images/box_aktuell.png','images/box.png',,'images/box_check.png','images/box_aktuell.png','images/box.png',,'images/box_check.png','images/box_aktuell.png','images/box.png',,'images/box_check.png','images/box_aktuell.png','images/box.png',,'images/box_check.png','images/box_aktuell.png','images/box.png',,'images/box_check.png','images/box_aktuell.png','images/box.png',,'images/box_check.png','images/box_aktuell.png','images/box.png',,'images/box_check.png','images/box_aktuell.png','images/box.png','images/logo.png','media/modul_1-3-5.mp3','media/modul_1-4-1.mp3','media/modul_1-4-2.mp3','media/modul_1-4-3.mp3','media/modul_1-4-4.mp3','media/modul_1-5-1.mp3','images/fcpa.png','images/bribery_act.png','images/web.png','images/web.png' )

A TypeError is not displayed by the Chrome debugger

Can these error messages be the cause of the crashes or are they normal and can they be ignored?

I am using Lectora Publisher Version 17.1.3(11275)

With thanks in advance and kind regards
R.Cürten

Comments