The article linked here has instructions at the bottom that should be helpful. The first message seems to indicate there is an incorrect entry made on your T4. If you are reporting employment income exempt under the Indian Act, you will also have an amount in box 71 of your T4 that is required.
As for the second error, if you could provide the question, I may be able to assist you. But, it's possible the instructions in the linked article here will resolve both issues.
