BumblebeeError

I have a problem with Leap 15.1, bumblebee and nVidia. I have followed the instructions at https://en.opensuse.org/SDB:NVIDIA_Bumblebee
Everything goes fine and when I check "optirun -status", I get "Bumblebee status: Ready (3.2.1). X inactive. Discrete video card is off." which is what it is supposed to be.
However, when I try to run "optirun -vvv glxgears -info" I get:

[12653.647717] [DEBUG]Reading file: /etc/bumblebee/bumblebee.conf
[12653.647973] [DEBUG]optirun version 3.2.1 starting...
[12653.647980] [DEBUG]Active configuration:
[12653.647983] [DEBUG] bumblebeed config file: /etc/bumblebee/bumblebee.conf
[12653.647987] [DEBUG] X display: :8
[12653.647990] [DEBUG] LD_LIBRARY_PATH: /usr/lib64/nvidia:/usr/lib/nvidia
[12653.647993] [DEBUG] Socket path: /var/run/bumblebee.socket
[12653.647997] [DEBUG] Accel/display bridge: auto
[12653.648012] [DEBUG] VGL Compression: proxy
[12653.648017] [DEBUG] VGLrun extra options:
[12653.648022] [DEBUG] Primus LD Path: /usr/lib64/primus:/usr/lib/primus
[12653.648076] [DEBUG]Using auto-detected bridge virtualgl
[12653.921695] [INFO]Response: No - error: Could not load GPU driver

[12653.921711] [ERROR]Cannot access secondary GPU - error: Could not load GPU driver

[12653.921718] [DEBUG]Socket closed.
[12653.921737] [ERROR]Aborting because fallback start is disabled.
[12653.921744] [DEBUG]Killing all remaining processes.


And when I check the status of bumblebeed, I get:
 bumblebeed.service - Bumblebee C Daemon
   Loaded: loaded (/usr/lib/systemd/system/bumblebeed.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2019-10-09 22:25:58 CEST; 41s ago
 Main PID: 27293 (bumblebeed)
    Tasks: 1 (limit: 4915)
   CGroup: /system.slice/bumblebeed.service
           └─27293 /usr/sbin/bumblebeed

oct 09 22:25:58 javiLaptop.168.2.27 systemd[1]: Started Bumblebee C Daemon.
oct 09 22:25:58 javiLaptop.168.2.27 bumblebeed[27293]: [12625.727542] [INFO]/usr/sbin/bumblebeed 3.2.1 started
oct 09 22:26:26 javiLaptop.168.2.27 bumblebeed[27293]: modprobe: ERROR: could not insert 'nvidia': No such device
oct 09 22:26:26 javiLaptop.168.2.27 bumblebeed[27293]: [12653.921660] [ERROR]Module nvidia could not be loaded (timeout?)
oct 09 22:26:26 javiLaptop.168.2.27 bumblebeed[27293]: [12653.921676] [ERROR]Could not load GPU driver

I can make any sense of the "modprobe: ERROR: could not insert 'nvidia': No such device" error. I've checked all forums I found, but no result.