Same here, can't efile any new resident.  We are getting Error code 184 and states:

352 : Line 58040 on the provincial or territorial Form 428 for the basic personal amount does not equal to the maximum
allowable:
1. If the amount is prorated due to immigrant status, a date of entry into Canada is required.
2. If the amount is prorated due to emigrant status, a date of departure from Canada is required.

We have put the date of entry and have marked for Prorate, no idea what else to do.