Visual Editor Broken

For the past four or five days, my visual editor has been broken. I believe it began with the WordPress update to 4.5.3. One of my authors could not write any posts at all, it would not allow him to see anything that was already written in the post and he could not click on anything in the visual editor except the title. He could not switch to text editor either. After making several attempts to fix this, I deleted a plugin that I thought was the cause of the problem at the time (as deleting it fixed the problem for him). Once I did, however, I found that I had the same problem all of a sudden. I am unable to write anything in the visual editor. I disabled the visual editor for myself and it seems to work, but I would like to have the visual editor back. Is there any solution for this? Any help would be much appreciated, thank you.