Getting a linker error while compiling FreeRTOS-Plus-TCP-multi-master library using MCU Expresso IDE

11:33:18 **** Incremental Build of configuration Debug for project FirmwareStandalone ****
make -r -j8 all 
Building target: FirmwareStandalone.axf
Invoking: MCU Linker
arm-none-eabi-gcc -nostdlib -L"D:\CProject\dlan-greenphy-sdk-3.2.1\dlan-greenphy-sdk-3.2.1\Applications\Debug" -L"D:\CProject\dlan-greenphy-sdk-3.2.1\dlan-greenphy-sdk-3.2.1\Libraries\Debug" -Xlinker -Map="FirmwareStandalone.map" -Xlinker --gc-sections -Xlinker -print-memory-usage -mcpu=cortex-m3 -mthumb -T FirmwareStandalone_Debug.ld -o "FirmwareStandalone.axf" ./src/cr_startup_lpc175x_6x.o ./src/crp.o ./src/main.o ./src/sysinit.o   -Wl,--whole-archive  -Wl,--no-whole-archive -lApplications -lLibraries
C:/NXP/MCUXpressoIDE_24.9.25/ide/plugins/com.nxp.mcuxpresso.tools.win32_24.9.0.202407110857/tools/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld.exe: D:\CProject\dlan-greenphy-sdk-3.2.1\dlan-greenphy-sdk-3.2.1\Libraries\Debug\libLibraries.a(httpd-fs.o): in function `httpd_fs_open':
D:\CProject\dlan-greenphy-sdk-3.2.1\dlan-greenphy-sdk-3.2.1\Libraries\Debug/../FreeRTOS-Plus-TCP-multi-master/source/portable/FileSystem/httpd-fs/httpd-fs.c:93:(.text.httpd_fs_open+0x50): undefined reference to `fs_root'
Memory region         Used Size  Region Size  %age Used
       MFlash512:      110480 B       512 KB     21.07%
        RamLoc32:       27540 B        32 KB     84.05%
        RamAHB32:       30848 B        32 KB     94.14%
collect2.exe: error: ld returned 1 exit status
make[1]: *** [makefile:49: FirmwareStandalone.axf] Error 1
make: *** [makefile:35: all] Error 2
"make -r -j8 all" terminated with exit code 2. Build might be incomplete.

11:33:18 Build Failed. 3 errors, 0 warnings. (took 408ms)

Could some one please support to resolve this issue and let me know if you need any additional details. Thanks

This file system code is not from us. Where did you get this code from?