Slim Application Error

[BenjaminClark]

When trying to sign in I receive the following error message. I would assume I have a problem with my micropub endpoint - but I have already successfully syndicated one instagram post to my own site, so not sure what has changed.

Details
Type: ErrorException
Code: 2
Message: Illegal string offset 'media-endpoint'
File: /web/sites/ownyourgram.com/controllers/auth.php
Line: 154
Trace

#0 /web/sites/ownyourgram.com/controllers/auth.php(154): Slim\Slim::handleErrors(2, 'Illegal string ...', '/web/sites/owny...', 154, Array)
#1 [internal function]: {closure}()
#2 /web/sites/ownyourgram.com/vendor/slim/slim/Slim/Router.php(172): call_user_func_array(Object(Closure), Array)
#3 /web/sites/ownyourgram.com/vendor/slim/slim/Slim/Slim.php(1222): Slim\Router->dispatch(Object(Slim\Route))
#4 /web/sites/ownyourgram.com/vendor/slim/slim/Slim/Middleware/Flash.php(86): Slim\Slim->call()
#5 /web/sites/ownyourgram.com/vendor/slim/slim/Slim/Middleware/MethodOverride.php(94): Slim\Middleware\Flash->call()
#6 /web/sites/ownyourgram.com/vendor/slim/slim/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride->call()
#7 /web/sites/ownyourgram.com/vendor/slim/slim/Slim/Slim.php(1174): Slim\Middleware\PrettyExceptions->call()
#8 /web/sites/ownyourgram.com/public/index.php(19): Slim\Slim->run()
#9 {main}