My first PHP page FjLocal dbconfig

Hello World!
min phpcon OK Fatal error: Uncaught Error: Call to a member function fetch() on bool in /volume1/web/index.php on line 87 Error: Call to a member function fetch() on bool in /volume1/web/index.php on line 87 Call Stack: 0.0001 357144 1. {main}() /volume1/web/index.php:0