diff --git a/frappe/__init__.py b/frappe/__init__.py
index bec6b74ac1..1ad39e0b32 100644
--- a/frappe/__init__.py
+++ b/frappe/__init__.py
@@ -14,7 +14,7 @@ import os, sys, importlib, inspect, json
 from .exceptions import *
 from .utils.jinja import get_jenv, get_template, render_template, get_email_from_template
 
-__version__ = '9.1.10'
+__version__ = '9.1.11'
 __title__ = "Frappe Framework"
 
 local = Local()
diff --git a/frappe/desk/notifications.py b/frappe/desk/notifications.py
index f93a3b4c0f..93cf23c120 100644
--- a/frappe/desk/notifications.py
+++ b/frappe/desk/notifications.py
@@ -161,7 +161,9 @@ def clear_notifications(user=None):
 		return
 
 	config = get_notification_config()
-	groups = list(config.get("for_doctype").keys()) + list(config.get("for_module").keys())
+	for_doctype = config.get('for_doctype').keys() if config.get('for_doctype') else []
+	for_module = list(config.get('for_module').keys()) if config.get('for_module') else []
+	groups = for_doctype + for_module
 	cache = frappe.cache()
 
 	for name in groups:
@@ -206,11 +208,13 @@ def get_notification_info_for_boot():
 def get_notification_config():
 	def _get():
 		config = frappe._dict()
-		for notification_config in frappe.get_hooks().notification_config:
-			nc = frappe.get_attr(notification_config)()
-			for key in ("for_doctype", "for_module", "for_other", "targets"):
-				config.setdefault(key, {})
-				config[key].update(nc.get(key, {}))
+		hooks = frappe.get_hooks()
+		if hooks:
+			for notification_config in hooks.notification_config:
+				nc = frappe.get_attr(notification_config)()
+				for key in ("for_doctype", "for_module", "for_other", "targets"):
+					config.setdefault(key, {})
+					config[key].update(nc.get(key, {}))
 		return config
 
 	return frappe.cache().get_value("notification_config", _get)
diff --git a/frappe/utils/password_strength.py b/frappe/utils/password_strength.py
index 95454bf249..a6b8f3f2a9 100644
--- a/frappe/utils/password_strength.py
+++ b/frappe/utils/password_strength.py
@@ -7,6 +7,7 @@ from zxcvbn import zxcvbn
 import frappe
 from frappe import _
 
+
 def test_password_strength(password, user_inputs=None):
 	'''Wrapper around zxcvbn.password_strength'''
 	result = zxcvbn(password, user_inputs)
@@ -35,6 +36,7 @@ default_feedback = {
 	],
 }
 
+
 def get_feedback(score, sequence):
 	"""
 	Returns the feedback dictionary consisting of ("warning","suggestions") for the given sequences.
@@ -66,6 +68,7 @@ def get_feedback(score, sequence):
 		}
 	return feedback
 
+
 def get_match_feedback(match, is_sole_match):
 	"""
 	Returns feedback as a dictionary for a certain match
@@ -81,32 +84,32 @@ def get_match_feedback(match, is_sole_match):
 	def fun_spatial():
 		feedback = {
 			"warning": _('Short keyboard patterns are easy to guess'),
-			"suggestions":[
-				 _("Make use of longer keyboard patterns")
+			"suggestions": [
+				_("Make use of longer keyboard patterns")
 			],
 		}
 
 		if match.get("turns") == 1:
 			feedback = {
 				"warning": _('Straight rows of keys are easy to guess'),
-				"suggestions":[
-					 _("Try to use a longer keyboard pattern with more turns")
+				"suggestions": [
+					_("Try to use a longer keyboard pattern with more turns")
 				],
 			}
 
 		return feedback
 
 	def fun_repeat():
-		feedback ={
+		feedback = {
 			"warning": _('Repeats like "abcabcabc" are only slightly harder to guess than "abc"'),
-			"suggestions":[
+			"suggestions": [
 				_("Try to avoid repeated words and characters")
 			],
 		}
-		if len(match["repeated_char"]) == 1:
+		if len(match.get("repeated_char")) == 1:
 			feedback = {
 				"warning": _('Repeats like "aaa" are easy to guess'),
-				"suggestions":[
+				"suggestions": [
 					_("Let's avoid repeated words and characters")
 				],
 			}
@@ -114,7 +117,7 @@ def get_match_feedback(match, is_sole_match):
 
 	def fun_sequence():
 		return {
-			"suggestions":[
+			"suggestions": [
 				_("Avoid sequences like abc or 6543 as they are easy to guess")
 			],
 		}
@@ -123,7 +126,7 @@ def get_match_feedback(match, is_sole_match):
 		if match["regex_name"] == "recent_year":
 			return {
 				"warning": _("Recent years are easy to guess."),
-				"suggestions":[
+				"suggestions": [
 					_("Avoid recent years."),
 					_("Avoid years that are associated with you.")
 				],
@@ -132,7 +135,7 @@ def get_match_feedback(match, is_sole_match):
 	def fun_date():
 		return {
 			"warning": _("Dates are often easy to guess."),
-			"suggestions":[
+			"suggestions": [
 				_("Avoid dates and years that are associated with you.")
 			],
 		}