Symptoms
It is not possible to create emoji domains in Plesk with specific emojis, for example, with the unicode name xn--f98h.tld on CentOS 7 or Debian 9. Plesk shows the error on the Home page after creating such a domain:
New configuration files for the Apache web server were not created due to the errors in configuration templates: Template processing failed: file = /usr/local/psa/admin/conf/templates/default/domainVhost.php, error = Template_Exception: Failed to perform IDN conversion from ASCII name 'xn--f98h.tld' file
Cause
CentOS 7 and Debian 9 are using outdated libraries for IDN conversion that do not support INTL_IDNA_VARIANT_UTS46.
Resolution
Create domains like xn--f98h.tld in Plesk on Centos 8 or Debian 10 servers.