What is the problem?
My Pi Cam is not detected by OctoPrint. I don't think it's detected by OctoPi either, but I'm not an expert. On the Control tab, it gives the error " Webcam stream not loaded". In Settings > Webcam & Timelapse, the test gives the broken image link graphic.
What did you already try to solve it?
Restarted OctoPrint
Restarted Raspberry Pi
Tried shorter cable
Made sure that the cable was firmly seated and clamped in the Pi Cam and Raspberry Pi
Checked a couple of videos to make sure that I had been installing the cable correctly
Additional information about your setup
Raspberry Pi 3B v1.2
OctoPrint version : 1.3.9
OctoPi version : 0.15.1
Pi Cam V2-8
lsusb output
Bus 001 Device 004: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
/var/log/webcamd.log
Starting up webcamDaemon...
--- Configuration: ----------------------------
camera: auto
usb options: -r 640x480 -f 10
raspi options: -fps 10
http options: -w ./www-octopi -n
No camera detected, trying again in two minutes
No camera detected, trying again in two minutes
No camera detected, trying again in two minutes
No camera detected, trying again in two minutes
No camera detected, trying again in two minutes
No camera detected, trying again in two minutes
No camera detected, trying again in two minutes