Hi Jaclyn,
Do you have a modification of your current child theme (x-child-integrity-light)? If so, you need to install a new x child theme and moved all your modifications to the new child theme, as you can see on the Appearance > Themes there is an error on the x-child-integrity-light child theme. Else, try switching to the parent X and see if that makes the site better.
I did not see what version of X your site is coming from but based on your child themes it is a legacy version, if this is true then readjusting some of your settings and content is inevitable. It’ll be easier though since you already have the content and if you utilize the Cornerstone.
However, if your child theme is heavily modified then I would strongly advise that you just restore back your site to the old version. Sorry I was not able to check your child theme to confirm this for couple of reasons, a) the x-child-integrity-light is not accessible from the backend and b) the FTP credentials you provided above did not work.
Thanks,