Sen2Cor 2.9 failure on SNAP 9.0

Hi everyone,
I installed Sen2Cor 2.9 on SNAP 9.0 on Windows 11 system. But Sen2Cor fail, I keep getting a “AttributeError: no such child: Region_Of_Interest” on the log files.

Syntax error in metadata, see report file for details.
Schema file: L2A_GIPP.xsd
Details: Element ‘Nr_Threads’: This element is not expected. Expected is ( Region_Of_Interest ).
Traceback (most recent call last):
File “C:\Users.snap\auxdata\Sen2Cor-02.09.00-win64\Lib\site-packages\sen2cor\”, line 541, in
File “C:\Users.snap\auxdata\Sen2Cor-02.09.00-win64\Lib\site-packages\sen2cor\”, line 387, in main
if not config.readPreferences():
File “C:\Users.snap\auxdata\Sen2Cor-02.09.00-win64\Lib\site-packages\sen2cor\”, line 4654, in readPreferences
subnode = node.Region_Of_Interest
File “src/lxml/lxml.objectify.pyx”, line 229, in lxml.objectify.ObjectifiedElement.getattr (src\lxml\lxml.objectify.c:3835)
File “src/lxml/lxml.objectify.pyx”, line 450, in lxml.objectify._lookupChildOrRaise (src\lxml\lxml.objectify.c:6539)
AttributeError: no such child: Region_Of_Interest
Finished tool execution in 0 seconds

The file is S2A_MSIL1C_20210421T160901_N0300_R140_T16QEJ_20210421T231254

Do you have an idea of how to resolve this problem?
Thanks in advance

This is related to the following section from S2-PDGS-MPC-L2A-SUM-V2.9.0

2.4 Runtime Configuration
Ground Image Processing Parameter (GIPP) are configured in an XML file named
L2A_GIPP.xml, located in the subdirectory of the processor (see example in
the appendix), where they can be configured by the user.The GIPP are listed in
their current context. These parameters, together with all input, output and other
auxiliary data are listed in the corresponding [S2-PDGS-MPC-L2A-IODD] document
and thus not repeated here

Your schema file (L2A_GIPP.xsd) may be corrupt or outdated. If you still have the senCor2.9 *.zip schema files from the step:

The schemas of the GIPP file, GIPP AC, SC, and PB files relative to Level-2A products are attached to the IODD document as a *.zipp attachment. The attachment should be saved, and renamed as .zip to enable it to be opened.

Please check that the schema file from the IODD document is the same as the one used in your calculation.