As librenms user run
./scripts/composer_wrapper.php install --no-dev
if that doesn’t fix it then
php artisan key:generate
check /opt/librenms/.env file you should have that key and your database credentials
As librenms user run
./scripts/composer_wrapper.php install --no-dev
if that doesn’t fix it then
php artisan key:generate
check /opt/librenms/.env file you should have that key and your database credentials