Installed ownCloud using the OVA/Virtualbox appliance (on CentOS 7.5 host). All appeared to have gone well except that when loging in to the Administrator’s web page I always get errors and am not able to do anything (in apparently any module) :
Webfrontend error: The specified UMCP command arguments of the request are invalid. Server error message: Specified locale is not available
What should I do ?