[Question] I encounter an error while using playwright

Hello,

I ran few scripts on my computer with no problem but when I tried them on my server I encountered this problem :

(node:6134) UnhandledPromiseRejectionWarning: Error: Protocol error (Target.getBrowserContexts): Target closed.

It happens when I try to launch the browser.

Full length message :

(node:6134) UnhandledPromiseRejectionWarning: Error: Protocol error (Target.getBrowserContexts): Target closed.
    at /opt/docker-test/master-ci/Ami/tests/playwright/node_modules/playwright-core/lib/chromium/crConnection.js:121:63
    at new Promise (<anonymous>)
    at CRSession.send (/opt/docker-test/master-ci/Ami/tests/playwright/node_modules/playwright-core/lib/chromium/crConnection.js:120:16)
    at Function.connect (/opt/docker-test/master-ci/Ami/tests/playwright/node_modules/playwright-core/lib/chromium/crBrowser.js:48:68)
    at async Chromium.launch (/opt/docker-test/master-ci/Ami/tests/playwright/node_modules/playwright-core/lib/server/chromium.js:45:25)
    at async /opt/docker-test/master-ci/Ami/tests/playwright/test.js:5:25
(node:6134) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:6134) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

My code :

const playwright = require('playwright');

(async () => {
	  for (const browserType of ['chromium', 'firefox', 'webkit']) {
		      const browser = await playwright[browserType].launch();
		      const context = await browser.newContext();
		      const page = await context.newPage();
		      await page.goto('http://whatsmyuseragent.org/');
		      await page.screenshot({ path: `example-${browserType}.png` });
		      await browser.close();
		    }
})();

[pavelfeldman]

Another debugging tip is to use launch({dumpio: true}). That prints browser output and helps debugging browser start issues. Could you try that our and send us logs if any? Thanks!

[pavelfeldman]

Also, https://github.com/microsoft/playwright/blob/master/.travis.yml has dependencies our Travis bots install to run Playwright