This is feedback from the help desk.
Error message:
[a4df1cc376641f0cce5b784c] [no req] PasswordError from line 62 of /var/www/mywiki/public_html/mediawiki-1.30.0/maintenance/changePassword.php: * The supplied credentials cannot be changed, as nothing would use them. * The authentication data change was not handled. Maybe no provider was configured? Backtrace: #0 /var/www/mywiki/public_html/mediawiki-1.30.0/maintenance/doMaintenance.php(92): ChangePassword->execute() #1 /var/www/mywiki/public_html/mediawiki-1.30.0/maintenance/changePassword.php(73): require_once(string) #2 {main}