Slim Application Error

The application could not run because of the following error:

Details

Type: Simplon\Mysql\MysqlException
Message: {"query":"\n SELECT *\n FROM `modals`\n WHERE `_publish` = 1\n ","params":[],"errorInfo":{"sqlStateCode":"3D000","code":1046,"message":"No database selected"}}
File: /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/vendor/simplon/mysql/src/Mysql.php
Line: 306

Trace

#0 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/vendor/simplon/mysql/src/Mysql.php(596): Simplon\Mysql\Mysql->prepareSelect()
#1 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/vendor/sennep/slim-php-base/Sennep/Api.php(115): Simplon\Mysql\Mysql->fetchRowMany()
#2 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/app/api/ModalsApi.php(15): Sennep\Api->dbFetchRowMany()
#3 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/vendor/sennep/slim-php-base/Sennep/Controller.php(64): ModalsApi->get_modal()
#4 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/app/controller/BaseController.php(51): Sennep\Controller->api()
#5 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/app/bootstrap/routes.php(224): BaseController->__construct()
#6 [internal function]: {closure}()
#7 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/vendor/slim/slim/Slim/Slim.php(596): call_user_func()
#8 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/vendor/slim/slim/Slim/Slim.php(1365): Slim\Slim->notFound()
#9 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/vendor/slim/slim/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#10 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/vendor/slim/slim/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#11 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/vendor/slim/slim/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride->call()
#12 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/vendor/slim/slim/Slim/Slim.php(1300): Slim\Middleware\PrettyExceptions->call()
#13 /var/www/vhosts/devwww.thepalladiumgroup.com/httpdocs/index.php(72): Slim\Slim->run()
#14 {main}