In order to fix an issue with the Module system in the 2.4.54 training VM please do the following:

Log into the VM via SSH / directly via VirtualBox (username: misp / password: Password1234)

cd /var/www/MISP
git pull origin 2.4

cd /usr/local/src/misp-modules
git pull origin master

sudo pip3 install --upgrade -I -r REQUIREMENTS
sudo pip3 install --upgrade -I .

After this is done, restart the VM. If anything goes wrong or you have any questions don't be afraid to ask! :)