SLOW wordpress backend and permission ussues with plugins

Hello, We are using Vultr for our server and Cloudflare for hosting.

Our Wordpress backend dashboard is EXTREMELY slow. I normally use Siteground for my other websites and there speed for Wordpress frontend and backend is very fast. Need to see if we can get things moving that fast.

I am also receiving errors when updating plugins. This is the error popping up: “The update cannot be installed because some files could not be copied. This is usually due to inconsistent file permissions.” I looked it up and it seems like the community is saying this has to do with Server permissions

Thank you