Was a real headache fixing the issue where I’d go to make a new post and would get a slew of errors like this:

Warning: Attempt to read property "post_type" on null in /REDACTED/wp-includes/post.php

Ended up being a simple enough fix: When importing the database using phpMyAdmin, I had to uncheck the Do not use AUTO_INCREMENT for zero values option under the Format-specific options section.