local variable 'excel_instance' referenced before assignment

 local variable 'excel_instance' referenced before assignment
Traceback (most recent call last):
File "D:\下载\shadowbot-5.17.20\python\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "D:\下载\shadowbot-5.17.20\python\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "D:\下载\shadowbot-5.17.20\python\lib\site-packages\xbot_interpreter.py", line 109, in <module>
main()
File "D:\下载\shadowbot-5.17.20\python\lib\site-packages\xbot_interpreter.py", line 59, in main
mod.main(args)
File "C:\Users\Mayn\AppData\Local\ShadowBot\users\683676167367184386\apps\4e3b0eb1-1e14-453c-9408-e30c25cb2788\xbot_robot\main.py", line 14, in main
for 当前循环到的行_list, 当前循环到的行号, _ in xbot_visual.excel.loop_data_from_workbook_with_return_item_location(workbook=excel_instance, loop_way="loop_row", range=None, begin_row_num="1", end_row_num="10", begin_column_name=None, end_column_name=None, has_header_row=False, range_begin_row_num="1", range_begin_column_name=None, range_end_row_num="10", range_end_column_name=None, sheet_name="", using_text=False, text_cols="", clear_space=False, _block=("main", 6, "循环Excel内容")):
UnboundLocalError: local variable 'excel_instance' referenced before assignment