http://adfluenceapp.com/.well-known/acme-challenge/K8zaa9MKfCvevxerM-yh-wyPKpNCmh6cgQSRdp3Bdmg

I am trying to install zerossl certificate into godaddy plesk but I am stuck at one point where I need to open Key with following url.

http://adfluenceapp.com/.well-known/acme-challenge/K8zaa9MKfCvevxerM-yh-wyPKpNCmh6cgQSRdp3Bdmg
I am getting 404 error.
Can you please help me why ?

Thanks

Hi @jaydip

there is an IIS.

Do you allow extensionless files? If not, that’s a problem.

Read https://check-your-website.server-daten.de/?q=adfluenceapp.com#comments

A	Good: All checks /.well-known/acme-challenge/random-filename without redirects answer with 
the expected http status 404 - Not Found. Creating a Letsencrypt certificate via http-01 challenge 
should work. If it doesn't work: Check your vHost configuration (apachectl -S, httpd -S, nginx -T). 
Every combination of port and ServerName / ServerAlias (Apache) or Server (Nginx) must be 
unique. Merge duplicated entries in one vHost. If you use an IIS, extensionless files must be 
allowed in the /.well-known/acme-challenge subdirectory. Create a web.config in that directory. 
Content: <configuration><system.webServer><staticContent><mimeMap fileExtension="." mimeType="text/plain" /></staticContent></system.webServer></configuration>. 
If you have a redirect http ⇒ https, that's ok, Letsencrypt follows such redirects to port 80 / 443 
(same or other server). There must be a certificate. But the certificate may be expired, self 
signed or with a not matching domain name. Checking the validation file Letsencrypt ignores 
such certificate errors.

did you put a file there?

Yes. I have added file there.

how can I allow extensionless files in godaddy plesk ?

I am following this url https://zerossl.com/free-ssl/#crt

I don’t know. Ask GoDaddy.

If it isn’t possible, you must use dns validation.