Fatal error: Uncaught TypeError: Argument 2 passed to SelectQuery::fields() must be of the type array, null given, called in /home/dibya1/web/aad.assam.org/public_html/includes/entity.inc on line 320 and defined in /home/dibya1/web/aad.assam.org/public_html/includes/database/select.inc:1316 Stack trace: #0 /home/dibya1/web/aad.assam.org/public_html/includes/entity.inc(320): SelectQuery->fields() #1 /home/dibya1/web/aad.assam.org/public_html/sites/all/modules/entity/includes/entity.controller.inc(175): DrupalDefaultEntityController->buildQuery() #2 /home/dibya1/web/aad.assam.org/public_html/sites/all/modules/entity/includes/entity.controller.inc(719): EntityAPIController->buildQuery() #3 /home/dibya1/web/aad.assam.org/public_html/sites/all/modules/rules/includes/rules.core.inc(237): EntityAPIControllerExportable->buildQuery() #4 /home/dibya1/web/aad.assam.org/public_html/sites/all/modules/entity/includes/entity.controller.inc(192): RulesEntityController->buildQuery() #5 /home/dibya1/web/aad.assam.org/public_html/sites/all/ in /home/dibya1/web/aad.assam.org/public_html/includes/database/select.inc on line 1316