I add a new alias. In the field "Directory mount point" I just put in a "/" and that was my mistake, ´cause now I want to delete this alias, but I´ve got an error-message and in the debugger that the system can´t find this directory.
How can I delete this Alias manually
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EDIT: Okay - I deleted the entry in the database and then I add this alias new. After this I can work with it perfectly.