I founding problem OX install in Debian ecth.
Clean debian ... step by step your howto... thx ...
Someone not good your howto, becouse :
/opt/.../createcontext -A .... context 1 could not be created: Server response: No server registered with name=xoserver
com.openexchange ..... storage.mysqlStorage.OXContextMySQLStorage create SERVER: Storage Error
Mysql base setting. mysql loggin > OK. (GRANT ALL by openexchange user)