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missing assembly reference?

I was having trouble with Vuforia after working on it for a long time and then building it on Android. The app ui/canvas worked, but then when I got to the vuforia part, it was just completely blacked out. So, I was playing around with it and then other errors showed up so I ended up reinstalling unity + vuforia. I have all xr settings ready + vuforia .license key + image targets are showing properly. But, I see 38 errors in console pointing to errors like:

 

Assets/Vuforia/Scripts/VuforiaBehaviour.cs(19,33): error CS0115: `Vuforia.VuforiaBehaviour.Awake()' is marked as an override but no suitable method found to override

 

Assets/Vuforia/Scripts/Internal/VuforiaBehaviourComponentFactory.cs(50,16): error CS0246: The type or namespace name `WordAbstractBehaviour' could not be found. Are you missing an assembly reference?

 

but I have these scripts and I can open it on visual studio. 

 

Any suggestions for how to 1) fix these console errors 2) how to get the app working on android?

 

Hello playottiya,

What version of Unity + Vuforia are you using? Was this project migrated from an older version of either? Do you see these same errors in the samples?

Thanks,

Vuforia Support