I’ve been using your free plugin for years without any issues. This week I received notice that there are 30 days remaining to renew my certificate, but after uploading the files to the well-known/acme-challenge folder as always, I received a message that varification failed and I should try DNS.
The installed version is 4.6.0
I am also suffering from the same phenomenon.
I deleted and reinstalled as you suggested.
‘SSL certificate cannot be installed!
Due to technical limitations, it’s currently not possible to install SSL certificate on an IP address or a localhost. Please install the plugin on a publicly facing, worldwide unique domain name such as sslzen.com and try again.’
Please tell me what to do.