SSL active but wont work

I’m running into an issue with my site and could use some guidance. After switching Windows users and testing in private browsing, I’m seeing a “connection is not secure” warning (this just started happening). A friend of mine is also getting the same error on their iPhone using Firefox Focus, and when the site does load, it shows a default WordPress placeholder instead of the site I built. However, on my end, the site loaded fine on both my phone and PC, with and without private browsing. Now today it did not. So clearly something isn’t right, and I’m not sure what’s causing the inconsistency. For context, I had the site set up under a subdomain. I’ve since removed my domain from both Cloudflare and InfinityFree and reset the installation to use the free subdomain again. At this point, I’m unsure how to proceed: * Should I point the domain back to InfinityFree and start fresh after some time? * Or should I keep the nameservers on Cloudflare and configure everything properly from there (SSL, DNS, etc.)? Any step-by-step guidance on the correct way to fix this would be really appreciated.