use the chromedriver npm package to download the webdriver version compatible with the installed chrome version

e2e/protractor-ci.conf.js

@@ -7,4 +7,8 @@ config.capabilities = {
     }
 };
 
+// don't use protractor's webdriver, as it may be incompatible with the installed chrome version
+config.directConnect = false;
+config.seleniumAddress = 'http://localhost:4444/wd/hub';
+
 exports.config = config;