@aziz So, certificate for *.devz.cloud is already there, so if you install apps on subdomain it will work. Cert for devz.cloud (it is not a subdomain, so we have to get a separate cert from the wildcard cert) is getting rate limited.
You can just wait for 2-3 days to install an app on the bare domain and that should work. You should be able to install apps in subdomains in the meantime.