Slim Application Error

The application could not run because of the following error:

Details

Type: ErrorException
Code: 8
Message: Trying to access array offset on value of type null
File: /home/133474.cloudwaysapps.com/fbxqepzjnj/public_html/routes/experts.php
Line: 165

Trace

#0 /home/133474.cloudwaysapps.com/fbxqepzjnj/public_html/routes/experts.php(165): Slim\Slim::handleErrors()
#1 [internal function]: {closure}()
#2 /home/133474.cloudwaysapps.com/fbxqepzjnj/public_html/Slim/Route.php(462): call_user_func_array()
#3 /home/133474.cloudwaysapps.com/fbxqepzjnj/public_html/Slim/Slim.php(1326): Slim\Route->dispatch()
#4 /home/133474.cloudwaysapps.com/fbxqepzjnj/public_html/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#5 /home/133474.cloudwaysapps.com/fbxqepzjnj/public_html/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#6 /home/133474.cloudwaysapps.com/fbxqepzjnj/public_html/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride->call()
#7 /home/133474.cloudwaysapps.com/fbxqepzjnj/public_html/Slim/Slim.php(1271): Slim\Middleware\PrettyExceptions->call()
#8 /home/133474.cloudwaysapps.com/fbxqepzjnj/public_html/index.php(271): Slim\Slim->run()
#9 {main}