Platform Event Basics :Subscribe to Platform Event :Subscribe to a Platform Event in an Apex Trigger

its working just modify the line no.9 as
newTask.subject = ' follow up on shipped order 105 ' ;

Publishing an Order_Event__e did not create the associated task successfully. Check your trigger and event and try again.
please help @binaryprogramming

Error help =Publishing an Order_Event__e did not create the associated task successfully. Check your trigger and event and try again.

ERRO - HELP . Publishing an Order_Event__e did not create the associated task successfully