Error in print_control_identifiers method when trying to read controls

[svikas01]

I am trying to automate a third party desktop application but while reading control tree of one of the screen
It seems some of the control is having null value, Please suggest a workaround as due to this error i am not able to read the controls.

//Code
PODlg = app.window(title_re=".Purchase Order .")
findbtn = PODlg.child_window(title="tbItemFind", control_type="SplitButton")
PODlg.print_control_identifiers()

//Error
C:\Thome\BASS_PO\venv\Scripts\python.exe C:\Thome\BASS_PO\check1.py
Traceback (most recent call last):
File "C:\Thome\BASS_PO\check1.py", line 40, in
PODlg.print_control_identifiers()
File "C:\Thome\BASS_PO\venv\lib\site-packages\pywinauto\application.py", line 624, in print_control_identifiers
ctrl_names = findbestmatch.get_control_names(ctrl, all_ctrls, txt_ctrls)
File "C:\Thome\BASS_PO\venv\lib\site-packages\pywinauto\findbestmatch.py", line 309, in get_control_names
names.append(cleaned + friendly_class_name)
TypeError: can only concatenate str (not "NoneType") to str