[Plugin: WP-Table Reloaded] Not Found Error on Save

I have changed nothing that I was doing. However, whenever I try to update or change a table, it now gives me a 404 error message saying,

“Not Found Sorry, but you are looking for something that isn’t here.”

All the tables still work on my site, with example being here: https://strawberryplants.org/strawberry-varieties/

I need to be able to update the tables. Neither the update button or save and go back buttons work. Clicking either gives me the error and no implemented change.

Please help!