I just uploaded a slightly modified version of the PoodLL filter to Moodle.org. Its a minor release, though I flagged it as supporting Moodle 3.1 ( ...because it will run on Moodle 3.1 with no issue.)
The changes are:
- fixed some deprecated code thanks to a contrib. from Jun Wan
- fixed a bug that wrongly reported "no registration key" when using the HTML 5 version of widgets such as stopwatches, flashcards and timers.