I have a weird one on my hands.
All of a sudden (and I mean overnight with no changes to the site,) I started getting 500 Internal Error as well as not being able to access my /wp-admin dashboard.
I CAN login going directly to /wp-login.php but once I'm in there, I randomly get redirected to a 404 page not found error. This happens sometimes and not every time. For example /wp-admin/plugins.php points to a 404.
I have not recently installed new plugins. The last change I made was to my header.php and it was adding a simple image.
Last night everything was fine in there and this morning it feels like a logistical nightmare.
I have also tried deactivating plugins, testing, and reactivating one at a time to see if I can find a culprit and that isn't working.
Any guidance would be greatly appreciated!