One possibility is that some of the libraries have a ‘test’ folder, which needs to be deleted otherwise they cause compilation errors. I think you didn’t post all the errors so I can’t be sure, but if you see any error pointing to some /test folder, then you should delete those test folders.
Also, the original UIPEthernet libraries does not contain some of the improvements that Stefan and I made. You should use this modified UIPEthernet library (my own fork under /fixes/dhcp branch):
https://github.com/OpenSprinkler/UIPEthernet/tree/fixes/dhcp
I’ve tried to submit a pull request but the author did not seem to be taking pull request yet so I had to keep it in my own fork.