APP-HXT-39167 You do not have access privilege to any operating unit error on Timekeeper (HXTTIM00) Form (Doc ID 579221.1)

Symptoms

On 12.0.4 in Production:
When attempting to click in the In or Out column in the timecard to change the time, the following error occurs:

ERROR
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APP-HXT-39167: SUMMARY : FRM-40735: WHEN-NEW-BLOCK-INSTANCE trigger raised unhandled exception ORA-20001.
further checking showed that the error was logged in fnd_log_messages table. The error there was:
ORA-20001: APP-FND-02901: You do not have access privilege to any operating unit. Please check if your profile option MO: Security Profile includes any operating unit or the profile option MO: Operating Unit is set.
It looks like this error is happening when the form calls mo_global.init('HXC');

Cause

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