Getting Error while installing the titan.Core in Cygwin

Question

While installing the titan.core provided by the link (https://gitlab.eclipse.org/eclipse/titan/titan.core) using Cygwin in Windows 10 by following the steps provided in the file README.cygwin provided by Eclipse by updating the paths in the scripts and create the Make files (Makefile.personal) as below, getting the Installation error in the Error details.

Steps followed in README.cygwin in the below link:

https://gitlab.eclipse.org/eclipse/titan/titan.core/-/blob/master/README.cygwin?ref_type=heads

Makefile.personal file:

TTCN3_DIR := C:\cygwin64\home\SUBBARAMAIAH\Install
JDKDIR := C:\Program Files\Java\jdk-21
JNI := no
GUI := no
GEN_PDF := no
DEBUG := no
OLD_LIBEDIT := yes
CPPFLAGS := -I C:\cygwin64\usr\include -L C:\cygwin64\lib

Commands given for installation (provided in README.cygwin):

make dep

make -j

make install

Error Details:

mkdir -p C:\cygwin64\home\SUBBARAMAIAH\Install/bin
cp ttcn3_profmerge.exe C:\cygwin64\home\SUBBARAMAIAH\Install/bin
mkdir -p C:\cygwin64\home\SUBBARAMAIAH\Install/man/man1
cp ttcn3_profmerge.1 C:\cygwin64\home\SUBBARAMAIAH\Install/man/man1
mkdir -p C:\cygwin64\home\SUBBARAMAIAH\Install/include/RT1
cp RT1/TitanLoggerApi*.hh C:\cygwin64\home\SUBBARAMAIAH\Install/include/RT1
cp: target 'C:cygwin64homeSUBBARAMAIAHInstall/include/RT1' is not a directory
make[1]: *** [Makefile:295: install] Error 1
make[1]: Leaving directory '/home/SUBBARAMAIAH/titan.core/core'
make: *** [Makefile:77: install] Error 2

SUBBARAMAIAH@SUBBARAMAIAH ~/titan.core

I would appreciate your help in understanding and resolving the cause of this error. Thank you.