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failed: error during websocket handshake: unexpected response code: 400

web api client getting the Remote server returned an error:500

debug PHP for the newbies in error logs with execution time

ERROR Error: Uncaught (in promise): NullInjectorError: StaticInjectorError(r)[n -> n]: StaticInjectorError(Platform: core)[n -> n]: NullInjectorError: No provider for n!

[ERROR] Error executing Maven. java.io.FileNotFoundException: The specified user settings file does not exist: /usr/lib/jvm/java-1.8.0-openjdk-amd64

const fs = require('fs'); const filename = process.argv[2]; readfile(filename, 'utf8', (error, data) => { if (error) { console.error(error.message); return; } console.log(data);

remote: error: refusing to update checked out branch: refs/heads/master remote: error: by default, updating the current branch in a non-bare repository

ERROR Error: If ngModel is used within a form tag, either the name attribute must be set or the form control must be defined as 'standalone' in ngModelOptions.

PHP Fatal error: Uncaught Error: Class 'IntlDateFormatter' not found in /var/www/html/magento/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:121