Kontact or kmail does not start

[phil-deb1 . merlin]

Since last update Debian Sid AMD64 Kontact or Kmail does not start i have this 
message if i start from Konsole . 
[2895:2895:0803/143352.462637:ERROR:zygote_host_impl_linux.cc(90)] Running as 
root without --no-sandbox is not supported. See https://crbug.com/638180 . 
or this message is normally for Chrome. Why Kontact give this message. 
Help . 
Philippe Merlin