XF 2.1 Error after updating Navigation Tab Update

[coolbreeze86]

I am getting the following error while trying to add an extra tab in the navigation.

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ParseError: syntax error, unexpected 'Fn' (T_FN), expecting identifier (T_STRING) or '{' in src/XF/Template/Compiler.php at line 8

1. Composer\Autoload\includeFile() in src/vendor/composer/ClassLoader.php at line 322
2. Composer\Autoload\ClassLoader->loadClass()
3. spl_autoload_call() in src/XF/App.php at line 1292
4. XF\App->XF\{closure}() in src/XF/Container.php at line 28
5. XF\Container->offsetGet() in src/XF/App.php at line 566
6. XF\App->XF\{closure}() in src/XF/Container.php at line 28
7. XF\Container->offsetGet() in src/XF/App.php at line 2214
8. XF\App->offsetGet() in src/XF/Entity/Navigation.php at line 412
9. XF\Entity\Navigation->getNavigationCompiler() in src/XF/Entity/Navigation.php at line 142
10. XF\Entity\Navigation->setTypeFromInput() in src/XF/Admin/Controller/Navigation.php at line 91
11. XF\Admin\Controller\Navigation->XF\Admin\Controller\{closure}() in src/XF/Mvc/FormAction.php at line 164
12. XF\Mvc\FormAction->run() in src/XF/Admin/Controller/Navigation.php at line 127
13. XF\Admin\Controller\Navigation->actionSave() in src/XF/Mvc/Dispatcher.php at line 321
14. XF\Mvc\Dispatcher->dispatchClass() in src/XF/Mvc/Dispatcher.php at line 244
15. XF\Mvc\Dispatcher->dispatchFromMatch() in src/XF/Mvc/Dispatcher.php at line 100
16. XF\Mvc\Dispatcher->dispatchLoop() in src/XF/Mvc/Dispatcher.php at line 50
17. XF\Mvc\Dispatcher->run() in src/XF/App.php at line 2178
18. XF\App->run() in src/XF.php at line 390
19. XF::runApp() in admin.php at line 13