Compiler error with UpmOperationFactory.cs

I just started with unity and I can’t enter playmode because of two errors. I have tried google searching both errors and I cannot figure it out. :confused:

1: error CS0246: The type or namespace name ‘UpmRemoveOperation’ could not be found. Are you missing an assembly reference?

2: error CS0246: The type or namespace name `UpmSearchOperation’ could not be found. Are you missing an assembly reference?

Dude… The same problem is happening with me, I tried to look in unity folder… and i found a script, his name is UpmOperationFactory… when i copy and paste into a script in my unity game, some build errors happen… but i Don’t know how to fix it…