Since 3/3/2020 "https://app.asana.com/api/1.0/tasks" failed with error "custom_fields: Value cannot be an array: []"

Since 3/3/2020, our api call to “https://app.asana.com/api/1.0/tasks” has stopped working with the exception error “custom_fields: Value cannot be an array: ”. Below is the sample body of the url that was sent out with all the ids been replaced:
{:name=>"(For testing only) test item",
:workspace=> 33333333,
:notes=>" sample noe ",
:projects=>“11111111110000”,
:due_on=>Wed, 04 Mar 2020,
:custom_fields=>[{11111111111=>22222222}]}

Error:
"{“errors”:[{“message”:“custom_fields: Value cannot be an array: ”,“help”:"For more information on API status codes and how to handle them, read the docs on errors: https://asana.com/developers/documentation/getting-started/errors"}]}"

This code has not been changed and was working until yesterday morning 3/3/2020. Just wonder if Asana has changed this api recently.

Regards,
Tony.

Hi @Tony_Hoang and welcome to the forum,

Yes, it seems there was a recent change - see this thread for more info:

If the existing solutions given there don’t help you, you might want to add onto that thread rather than post more here, so that the discussion can be more centralized.