3613418 - User can not login SuccessFactors instance due to incorrect locale setting

• Users was unable to log in SuccessFactors instance. Upon login, an error popup window is displayed with error message "Failed to execute 'fetch' on 'Window': Failed to read the 'headers' property from 'RequestInit'".
• The issue can be reproduced consistently even if browser cache is cleared.

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental." 

SAP SuccessFactors HCM Suite

1. Attempt to login to SAP SuccessFactors.
2. Observe the login failure and the error message window is displayed.

The issue is caused by the user's incorrect locale setting in the DEFAULT_LOCALE field the UDF. Example: the DEFAULT_LOCALE field was updated by Basic Import and the locale was set to "English" or "Chinese" instead of the system-supported "en_US" or "zh_CN".

1. Export user data through Admin Center > Employee Export.
2. Identify user's with incorrect DEFAULT_LOCALE settings.
3. Change the DEFAULT_LOCALE field to the standard language code. Example: "en_US"or "zh_CN".
4. Update the user's DEFAULT_LOCALE field using Basic Import.
5. Verify that users can log in successfully now.

login issue, locale setting, SAP SuccessFactors, missing definition, correlationId, Default_Locale, Failed to execute 'fetch' on 'Window', Failed to read the 'headers' property from 'RequestInit', language code, employee export, basic import , KBA , LOD-SF-PLT-LHOM , Legacy Home Page , Problem