We have been having the same issue the last few days. Using a multimeter, we did not see voltage on the PWM pins.
I did some additional research last night and found that the slot arrangements on the CRIO have changed, and may have to be accounted for when constructing the jaguar.
If I remember correctly, the digital sidecar needs to go in either slots 2 or 6 this year, if it is in slot 2 your code is fine, but if it's in slot 6 you must modify to:
Jaguar j = new Jaguar(
2,1); //the channel must be 2 for a digital car in slot 6.
(note: I'm programming in C++ and this is valid, but you may want to make sure the channel is the first param for Java)
I haven't had a chance to test if this resolves our issue, but I've got a good feeling
hope this can help.