AttributeError: module 'httpcore' has no attribute 'NetworkBackend'

[borborich]

File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/flask_wtf/init.py", line 1, in
from .csrf import CSRFProtect
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/flask_wtf/csrf.py", line 16, in
from wtforms import ValidationError
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/wtforms/init.py", line 1, in
from wtforms import validators
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/wtforms/validators.py", line 7, in
import email_validator
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/email_validator/init.py", line 6, in
import dns.resolver
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/dns/resolver.py", line 30, in
import dns._ddr
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/dns/_ddr.py", line 12, in
import dns.nameserver
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/dns/nameserver.py", line 5, in
import dns.asyncquery
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/dns/asyncquery.py", line 38, in
from dns.query import (
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/dns/query.py", line 67, in
_CoreNetworkBackend = httpcore.NetworkBackend
AttributeError: module 'httpcore' has no attribute 'NetworkBackend'