Can not run python xApp

Hello, I'm trying to run xApps on flexric. While I'm able to run C-made xApps, I got no luck at running Python xApps. When I try to run python3 xapp_gtp_moni.py I got the following error: Traceback (most recent call last): File "xapp_gtp_moni.py", line 1, in <module> import xapp_sdk as ric File "/root/flexric/build/examples/xApp/python3/xapp_sdk.py", line 15, in <module> import _xapp_sdk ImportError: /root/flexric/build/src/xApp/libe42_xapp_shared.so: undefined symbol: cp_kpm_ind_data

Any clue to help me? Thanks