The exact error message we are seeing is:
ERROR 1 photonVision coprocessor at path /photonvision/RoxCam2021-4361 not found on NetworkTables!
oarg.photonvision.PhotonCamera.verifyVersion(PhotonCamera.java:213)
That error says that the RIO can’t communicate with the coprocessor over NT. We’ve removed our Photon-running LL from the robot and we see that error all the time.
I see two options:
the coprocessor isn’t on the robot network
the name configured in the coprocessor isn’t the one expected by the code.
I’d use Shuffleboard/OutlineViewer/Glass with tree-view of all NT entries to check whether the DS laptop sees the coprocessor and under what name.
FIrst, I would look at what @Starlight220 said and follow those steps.
Next, you have another issue, a version mismatch between your PhotonLib vendor dependency judging from this code
On your coprocessor, you are running some dev version of PhotonVision according to the logs.
To fix this, change the 2021.1.2 in your vendordep to 2021.1.7 you have now and download the 2021.1.7 release. . You might notice that there is a 2021.1.8 release out, but stick with 2021.1.7 for now because there are some minor versioning issues with it at the moment.
If you have any issues after this, please let us know,