@fifi abd I didn't read through the entire error, but the last line indicates that there is an issue with XML in /home/v962173adm/nifi-1.8.0-bin/nifi-1.8.0/./conf/authorizers.xml. Take a look at row 159 and see if there is anything obvious. Maybe some copy/paste issue where an invalid or unicode character is there? Sometimes a forward or back quote gets in or that long dash character (Em Dash). If you attach that file, I can take a look and see if there is something obvious there.
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