can not able to resolve this while I try to do pairwise alignment in tcoffee using method externprofile_pair

[Aftab Raza]

when i run this command:
$t_coffee -seq seq.fasta -output clustalw -method externprofile_pair seq1_aligned.fasta seq2_aligned.fasta
i get this error:

--ERROR: #  [FATAL:T-COFFEE]

# The Program tc_R_generic_method Needed by T-COFFEE Could not be found
# If tc_R_generic_method is installed on your system:
#      -Make sure tc_R_generic_method is in your $path:
# If tc_R_generic_method is NOT installed obtain a copy from:
# (null)
#
#
# and install it manualy
and im not able to resolve it please help me.
I am using this version of tcoffe:T-COFFEE Version_13.41.0.28bdc39 (2019-11-30 10:21:53 - Revision 5d5a1c1 - Build 465)