MMM 2.4.0 black image

[nr23se]

updated my magic mirror to 2.4.0 and it's working fine. tried to install mmm-randombackground after that but only gets a black screen and the magic mirror gets into a reboot loop

my config file:

modules: [

{
	module : 'MMM-RandomBackground',
	position : 'fullscreen_below', // Any region but this one makes the most sense
	config : {
		animationSpeed : 2000,
		updateInterval : 5000

// opacity : 0.7,
}
},

mmm is working fine when deleting this part in the config file...

when installing mmm-randombackground i got this:

username@mymirror:~/MagicMirror/MMM-RandomBackground $ npm install

magic-mirror-module-random-background@0.0.1 postinstall /home/pi/MagicMirror/MMM-RandomBackground
./scripts/post-install.sh

Post install [in the future this creates a share to photos]
npm WARN magic-mirror-module-random-background@0.0.1 No repository field.

audited 9 packages in 3.606s
found 0 vulnerabilities

i've manually added a folder called photos in the mmm-randonbackground dir with photos called 1.jpg 2.jpg etc...

someone who understands whats wrong?