Cannot generate PDF report

Got this error when I tried to download report, I have installed fontconfig

{“type”:“ApiError”,“message”:“unknown error: Chrome failed to start: exited abnormally\n (unknown error: DevToolsActivePort file doesn’t exist)\n (The process started from chrome location /usr/share/graylog-server/bin/headless_shell is no longer running, so ChromeDriver is assuming that Chrome has crashed.)\n (Driver info: chromedriver=72.0.3583.1 (9ae827a6f6bbc9186d4e79681de885ce77d5bfe9),platform=Linux 4.9.0-12-amd64 x86_64) (WARNING: The server did not provide any stacktrace information)\nCommand duration or timeout: 888 milliseconds\nBuild info: version: ‘unknown’, revision: ‘unknown’, time: ‘unknown’\nSystem info: host: ‘scd-log01’, ip: ‘’, ‘Linux’, os.arch: ‘amd64’, os.version: ‘4.9.0-12-amd64’, java.version: ‘1.8.0_242’\nDriver info: driver.version: RemoteWebDriver”}

Any helps would be great!

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