How to load multi-account in columns with all data types and Generic Period

Hi, I'm trying to load a csv file that contains account members as headers , which include a smart list account. First, I intended to load the file with Period and Year as native dimensions, not generic, and my data rule worked.

But then, I changed my file to contains the months and years and with a mapping involved. So I changed my target application with Period and Year Generic, and I'm getting this error in the log:

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2023-04-29 02:03:41,247 ERROR [AIF]: EPMFDM-140274:Message - null

2023-04-29 02:03:41,248 INFO [AIF]: EPMFDM-140274:Message - Releasing ExpressionInterpreter

2023-04-29 02:03:41,249 ERROR [AIF]: Unexpected error: <type 'java.lang.RuntimeException'>