Notice: Undefined variable: param in C:\inetpub\wwwroot\api_1.0.1\api\database\solr.plugin.php on line 153

Fatal error: Uncaught Error: Call to a member function range() on null in C:\inetpub\wwwroot\api_1.0.1\api\database\solr.plugin.php:153 Stack trace: #0 C:\inetpub\wwwroot\api_1.0.1\api\lib\libdatabase.php(122): SolrPlugin->parse(Object(Config)) #1 C:\inetpub\wwwroot\api_1.0.1\api\lib\libdatabase.php(100): Database->parse(Object(Config)) #2 C:\inetpub\wwwroot\api_1.0.1\api\module\api\api.php(206): Database->query(Object(Config)) #3 C:\inetpub\wwwroot\api_1.0.1\api\lib\main.php(105): Api->__construct(Object(Config), 'object') #4 C:\inetpub\wwwroot\api_1.0.1\api\data.php(18): DataApi->__construct(Object(Config)) #5 {main} thrown in C:\inetpub\wwwroot\api_1.0.1\api\database\solr.plugin.php on line 153