526: Invaild SSL Certificate error

We are getting a 526 invalid SSL certificate error from our site https://jewishteeninitiative.org. Our hosting support says our SSL cert expired and it has been removed. They have a free SSL we could use, but with Cloudflare, it can’t see that the DNS is pointing to InMotion. They say I need to turn off proxy so their server can see the IP is here or activate SSL. How do I accomplish this in my Cloudflare account?

If InMotion will let you install your own certificate, Cloudflare can provide a free one. Their instructions have a section on installing a third party certificate: