Mine is doing the same thing.  My T4 doesn't have an amount put in box 26 for CPP pensionable earnings - is this the problem??

@gaildoucette81 Please make sure that everything is filed out on your T4 slip ex: Box 10 (province), Box 26 (pensionable earnings)…

@cab70 Yes, please enter something in Box 26. If your earnings are less than the Maximum annual pensionable earnings of 68,500, just enter your total earnings.