I had the same issue on a client site last night and he was down for a few hours. I highly suggest Updraft Backup plugin (I have no affiliation) but it has a double backup system which is wonderful and I set it up on like 10 WP sites of ours today.
Thanks anyway – I was able to add a <!–more–> button and style it white to match site bg then set the Div in the category page as dsiplay:none if anyone ever needs this hack.