Let's Encrypt - Error parsing key authorization

[hedacom]

Hello,

I have acticated Let's Encrypt in Direct Admin:
- Set letsencrypt=1 in directadmin.conf
- cd /usr/local/directadmin/custombuild
- ./build update
- ./build rewrite_confs
Followed from http://www.directadmin.com/features.php?id=1828.

But when I try to generate a certificate, it gives me the this error:
Getting challenge for domain.com from acme-server...
Waiting for domain verification...
Challenge is invalid. Details: Error parsing key authorization file: Invalid key authorization: 45 parts. Exiting...

Does anyone knows how I can solve this problem?
Thank you in advance!

 

[smtalk]

Try placing a file in /var/www/html/.well-known/acme-challenge/, for example test.txt and see if you can open it using http://www.domain.com/.well-known/acme-challenge/test.txt.

 

[hedacom]

It doesn't work: http://www.hedacom.eu/.well-known/acme-challenge/test.txt
How can I solve this?

 

[smtalk]

I think you're missing an alias in /etc/httpd/conf/extra/httpd-alias.conf file. Isn't it customized?