Running "lte_top_block_siso.grc" gives syntax error

[harshjoshi01]

hello everyone, i am using gnu radio version 3.10 and after successful installation of all the missing blocks,
i try to run one grc file "lte_top_block_siso.grc" but it gives following error,
Traceback (most recent call last):
File "/home/pi/gr-lte/examples/lte_top_block_siso.py", line 38, in
from lte_cp_ffo_sync import lte_cp_ffo_sync # grc-generated hier_block
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/pi/.grc_gnuradio/lte_cp_ffo_sync.py", line 54
self.lte_sync_frequency_0 = lte.sync_frequency(self., fftlen, "$id")
^
SyntaxError: invalid syntax

than i checked lte_cp_ffo_sync.grc and i saw there is one missing block lte_sync_frequency_c so now i don't know how to generate that missing block, if anyone know than please help!!

below i am attaching both grc files,