3 Django errors

Problem #1. Laptop #1 is an ASUS with Linux Mint 18.3 on it.
The problem is "ProgrammingError at /admin/doctor/doctor/

Unknown column 'doctor_doctor.first_name' in 'field list'

Request Method: GET
Request URL: http://192.168.0.121/admin/doctor/doctor/
Django Version: 2.0.4
Exception Type: ProgrammingError
Exception Value:

Unknown column 'doctor_doctor.first_name' in 'field list'

Exception Location: /home/medrec1/.virtualenvs/medrecproj/lib/python3.5/site-packages/mysql/connector/connection.py in _handle_result, line 432"
I have searched all of my files in the app on that machine and was unable to find any "field list" with "doctor_doctor.first_name OR even just first_name" in them. Tis happens when I click on the Doctors link on the Admin Screen and also after I add data in the Django generated form when I click on "SAVE".

Problem #2. Laptop #2 is also an ASUS running Linux Mint 18.3.
AttributeError at /admin/login/

'datetime.datetime' object has no attribute 'split'

Request Method: POST
Request URL: http://192.168.0.122/admin/login/?next=/admin/
Django Version: 2.0.4
Exception Type: AttributeError
Exception Value:

'datetime.datetime' object has no attribute 'split'

Exception Location: /home/medrec2/.local/lib/python3.6/site-packages/mysql/connector/conversion.py in _DATETIME_to_python, line 506
This happens when I log-in to the Admin of the app. None of my code is involved.

Problem #3. Laptop #3 is a HP running Ubuntu 18.04.
Unable to connect

Firefox can't establish a connection to the server at 192.168.0.119.

This is probably an error in my code as I was getting this error before. I have been following the code from: https://www.digitalocean.com/community/tutorials/how-to-set-up-django-with-postgres-nginx-and-gunicorn-on-ubuntu-16-04

Any thoughts, ideas or solutions to any or all of these problems?

Thanks in advance.

I have 3 laptops set up supposedly running the same code but each one gives me a different error message. See attached file for an explanation of the problems.

Each of the 3 systems are supposedly running the same code.

	Thanks for any thoughts, ideas, or SOLUTIONS for the listed problems.

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