Error database<br />
<b>Fatal error</b>:  Uncaught Error: Call to a member function prepare() on null in /opt/web/processing-web/db/DB.php:188
Stack trace:
#0 /opt/web/processing-web/db/DB.php(152): DB-&gt;prepare('select * from p...')
#1 /opt/web/processing-web/index.php(99): DB::row('select * from p...', Array)
#2 [internal function]: {closure}(Object(Slim\Route))
#3 /opt/web/processing-web/libs/vendor/slim/slim/Slim/Route.php(459): call_user_func_array(Object(Closure), Array)
#4 /opt/web/processing-web/libs/vendor/slim/slim/Slim/Slim.php(1326): Slim\Route-&gt;dispatch()
#5 /opt/web/processing-web/libs/vendor/slim/slim/Slim/Middleware/Flash.php(85): Slim\Slim-&gt;call()
#6 /opt/web/processing-web/libs/vendor/slim/slim/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash-&gt;call()
#7 /opt/web/processing-web/libs/vendor/slim/slim/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride-&gt;call()
#8 /opt/web/processing-web/libs/vendor/slim/slim/Slim/Slim.php(1271): Slim\Middleware\PrettyExceptions-&gt;call()
#9 /opt/web/processing-web/index.p in <b>/opt/web/processing-web/db/DB.php</b> on line <b>188</b><br />