I am getting code: #513 when trying to netfile for 2018 and CRA rejects it. I tried suggestions and all of them check out but still getting error code 513. Why?

Here are the details (and BTW, all these lines are filled automatically through easy steps, and all other years I had no problems):
Code: #513   - One or more of the following situations exists on your return:  
1. You entered an amount on line 5914 of your provincial or territorial Schedule 11 for eligible tuition fees paid without an entry on line 320 of your federal Schedule 11, or vice versa.  
2. Box 345 has not been ticked on your federal Schedule 11 to indicate part-time enrollment due to effects of impairment. You entered the number of months enrolled as a part-time student in box 325 without an entry on line 5916 of your provincial or territorial Schedule 11 for the part-time education (and textbook) amount, or vice versa.  
3. You entered the number of months enrolled as a full-time student in box 328 of your federal Schedule 11 without an entry on line 5918 of your provincial or territorial Schedule 11 for the full-time education (and textbook) amount, or vice versa.  

Please review your entries on these lines and make the necessary adjustments.

Has anyone encounter the same?