WordPress site hacked, fixed but now errors

Look in wp-includes/version.php for the current version and replace all WP core files and folders with the correct version from the Release Archive.

And then work your way through these resources and follow all instructions to completely clean your site or you may be hacked again. See FAQ: My site was hacked ? WordPress Codex and How to completely clean your hacked wordpress installation and How to find a backdoor in a hacked WordPress and Hardening WordPress ? WordPress Codex.

Change all passwords. Scan your own PC. Use https://sitecheck.sucuri.net/ before and after.

Tell your web host you got hacked; and consider changing to a more secure host: Recommended WordPress Web Hosting

Thanks so much. My host actually notified me. I have a pretty big host (1&1). I’m surprised they got hacked. I am thinking about changing though.

1&1 may be big, but they’re not that reliable; search these forums for feedback on them.