Oracle workflow is not working after customize it

Problem Summary==> Oracle workflow is not working after change a value Problem Description

I have done in Oracle ebs in Project module and i procurement modules.

Below is the path where I did the workflow edits.

1) I Procurement ---> Home page

2) Select INVENTORY item and add to cart.

Then View cart and check out.

In here need to enter “Show Delivery and Billing” details.

*Select Project

* select Task

Then click SAVE button to generate Account .

After clicking SAVE button error came,

""

Error

Account generation failed. Contact Purchasing Administrator if necessary.

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Did a value change to one of the workflows in Project module. But after making change, workflow does not effect from that.