seems like there was an update this night:
1.56-34-g25e8de3 - Thu Oct 17 2019 04:46:44 GMT+0200
Seems like www.librenms.org is down as well....
Ah, thanks. Doing google searches on that lead me to here. Running:
chgrp -R www-data bootstrap storage logs
chmod -R ug+rwx bootstrap storage logs
got it working again.