recently i asked a question in a topic about this error (string could not be parssed as xml).
the answer was enabling of nginx ( when i enabled it, this error doesn't appear anymore . ngix in some cases is not enable by default).
NOW i create a session in Moodle using BBB but when i want to open this session (BBB) ,it gives me an error
Error 404 not found
file not found
micro httpd