TypeError: Cannot read property '_' of undefined

[keltik85]

I get this error when i run grunt jasmine --stack:

$ grunt jasmine --stack
Loading "jasmine.js" tasks...ERROR
>> TypeError: Cannot read property '_' of undefined
Loading "Gruntfile.js" tasks...ERROR
>> TypeError: Cannot read property '_' of undefined
Warning: Cannot read property 'namespace' of undefined Use --force to continue.
TypeError: Cannot read property 'namespace' of undefined
  at Function.config.getRaw (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt\config.js:33:22)
  at Function.config.get (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt\config.js:46:32)
  at Object.module.exports [as config] (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt\config.js:12:19)
  at Object.<anonymous> (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt-jasmine-runner\tasks\jasmine.js:46:21)
  at Object.<anonymous> (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\util\task.js:294:30)
  at Task.runTaskFn (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\util\task.js:244:24)
  at Task.<anonymous> (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\util\task.js:293:12)
  at Task.start (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\util\task.js:302:5)
  at Object.grunt.tasks (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt.js:155:8)
  at Object.module.exports [as cli] (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt\cli.js:27:9)
  at Object.<anonymous> (C:\Users\myUsername\AppData\Roaming\npm\node_modules\grunt-cli\bin\grunt:44:20)
  at Module._compile (module.js:409:26)
  at Object.Module._extensions..js (module.js:416:10)
  at Module.load (module.js:343:32)
  at Function.Module._load (module.js:300:12)
  at Function.Module.runMain (module.js:441:10)
  at startup (node.js:139:18)
  at node.js:968:3


Aborted due to warnings.
Fatal error: Cannot read property 'exit' of undefined
TypeError: Cannot read property 'exit' of undefined
  at Object.fail.warn (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt\fail.js:64:15)
  at Object.task.options.error (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt.js:128:12)
  at Task.<anonymous> (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\util\task.js:214:29)
  at Task.runTaskFn (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\util\task.js:250:7)
  at Task.<anonymous> (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\util\task.js:293:12)
  at Task.start (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\util\task.js:302:5)
  at Object.grunt.tasks (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt.js:155:8)
  at Object.module.exports [as cli] (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt\cli.js:27:9)
  at Object.<anonymous> (C:\Users\myUsername\AppData\Roaming\npm\node_modules\grunt-cli\bin\grunt:44:20)
  at Module._compile (module.js:409:26)
  at Object.Module._extensions..js (module.js:416:10)
  at Module.load (module.js:343:32)
  at Function.Module._load (module.js:300:12)
  at Function.Module.runMain (module.js:441:10)
  at startup (node.js:139:18)
  at node.js:968:3

C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt\fail.js:48
  grunt.util.exit(typeof errcode === 'number' ? errcode : fail.code.FATAL_ERROR);
            ^

TypeError: Cannot read property 'exit' of undefined
  at Object.fail.fatal (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt\fail.js:48:13)
  at process.uncaughtHandler (C:\Users\myUsername\IdeaProjects\myProjectName\src\main\webapp\node_modules\grunt\lib\grunt.js:121:10)
  at emitOne (events.js:77:13)
  at process.emit (events.js:169:7)
  at process._fatalException (node.js:224:26)

My Grunt Version is:

$ grunt --version
grunt-cli v1.2.0
grunt v1.0.1

Can someone help me?