Cloudways SSL

I am migrating my websites to Cloudways. I’m finding that some of my domains work well with Flexible SSL and others just don’t work. I’ve tried to install a Cloudflare SSL Cert on my Cloudways Application but I’m getting a formatting error. Ideally I’d like to use Strict SSL and install my CF cert on CW. Has anyone run into this issue? Or does anyone know the SOP for getting this done correctly?