Support Admin Login Issues with Xenforo 2.3.6

[Gunstra]

When I go to login to my admin area I get this issue/error:
Oops! We ran into some problems. A server error occurred. Please try again later.

I turned on debugging and get this output.
Oops! We ran into some problems.
Error: Call to undefined method GuzzleHttp\Utils::chooseHandler() in src/vendor/guzzlehttp/guzzle/src/functions.php at line 61

1. GuzzleHttp\choose_handler() in src/addons/EWR/Backup/vendor/guzzlehttp/guzzle/src/HandlerStack.php at line 42
2. GuzzleHttp\HandlerStack::create() in src/addons/EWR/Backup/vendor/guzzlehttp/guzzle/src/Client.php at line 65
3. GuzzleHttp\Client->__construct() in src/XF/SubContainer/Http.php at line 108
4. XF\SubContainer\Http->createClient() in src/XF/SubContainer/Http.php at line 17
5. XF\SubContainer\Http->XF\SubContainer\{closure}() in src/XF/Container.php at line 33
6. XF\Container->offsetGet() in src/XF/SubContainer/Http.php at line 120
7. XF\SubContainer\Http->client() in src/addons/Andrew/ModeratorPanel/XF/Repository/User.php at line 50
8. Andrew\ModeratorPanel\XF\Repository\User->getIpCountry() in src/addons/Andrew/ModeratorPanel/XF/Service/User/Login.php at line 22
9. Andrew\ModeratorPanel\XF\Service\User\Login->validate() in src/XF/Admin/Controller/LoginController.php at line 74
10. XF\Admin\Controller\LoginController->actionLogin() in src/addons/XV/Admin/Controller/Login.php at line 49
11. XV\Admin\Controller\Login->actionLogin() in src/XF/Mvc/Dispatcher.php at line 362
12. XF\Mvc\Dispatcher->dispatchClass() in src/XF/Mvc/Dispatcher.php at line 264
13. XF\Mvc\Dispatcher->dispatchFromMatch() in src/XF/Mvc/Dispatcher.php at line 121
14. XF\Mvc\Dispatcher->dispatchLoop() in src/XF/Mvc/Dispatcher.php at line 63
15. XF\Mvc\Dispatcher->run() in src/XF/App.php at line 2826
16. XF\App->run() in src/XF.php at line 806
17. XF::runApp() in admin.php at line 15

Any help is appreciated thank you in advance.

 

[Bejay4sure]

Are you installing the version for the first time or you upgraded? if you upgraded try to reinstall by adding install at the end of the homepage URL. But if you are installing the version for the first time it meant you might Tampa with some of the files, so you have to re-upload a clean files don't worry about the installation it will be intact. If all of these didn't work then you have to double check your hosting service. To The Best Of My Knowledge .