There is an error in image/service/phpldapadmin/assets/apache2/phpldapadmin-ssl.conf
On the line for the CA certificate, the final "}" is missing.
SSLCACertificateFile /osixia/phpldapadmin/apache2/ssl/${SSL_CA_CRT_FILENAME
and apache2 won't start with this error.
The problem seems to be the same with the image on the docker registry.