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Bench --site erpnext-site3 install-app erpnext give trhis error invalid syntax (utils.py, line 131)

frappe-bench$ bench --site erpnext-site3 install-app erpnext
WARN: bench is installed in editable mode!

This is not the recommended mode of installation for production. Instead, install the package from PyPI with: pip install frappe-bench

Installing erpnext…
Updating DocTypes for erpnext : [ ] 3%An error occurred while installing erpnext:
invalid syntax (utils.py, line 131)

hi community
where is the heroes of erpnext to answer my queiston above?