Angular @ViewChild() error: Expected 2 arguments, but got 1

Source: https://stackoverflow.com/questions/56704164/angular-viewchild-error-expected-2-arguments-but-got-1

In Angular 8 , ViewChild takes 2 parameters
 @ViewChild(ChildDirective, {static: false}) Component

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Check to be sure that port 22 is enabled before you reload

 https://superuser.com/questions/590600/ufw-is-active-but-not-enabled-why etting  ENABLED=yes  in  /etc/ufw/ufw.conf  did it for me. $ sudo ...