diff --git a/emperor.ini b/emperor.ini
index c5c3810a1..3eeac3a53 100644
--- a/emperor.ini
+++ b/emperor.ini
@@ -3,6 +3,7 @@ strict-mode = true
 protocol = uwsgi
 master = true
 enable-threads = true
+lazy-apps = true
 emperor = ./vassals/*/*.ini
 
 # See https://uwsgi-docs.readthedocs.io/en/latest/Emperor.html#passing-configuration-parameters-to-all-vassals
@@ -13,3 +14,5 @@ emperor-on-demand-extension = .socket
 fastrouter = 127.0.0.1:8001
 fastrouter-subscription-server = /tmp/sock2
 vacuum = true
+
+log-format = %(host) - %(addr) - %(user) [%(ltime)] "%(method) %(uri) %(proto)" %(status) %(size) "%(referer)" "%(uagent)"
diff --git a/entrypoint.sh b/entrypoint.sh
index bcc1b78d3..a519b31d5 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -29,5 +29,5 @@ flask db upgrade
 
 flask initdb
 
-exec uwsgi --http :5000 --workers 1 --threads 2 --wsgi-file subscribie.wsgi --touch-chain-reload subscribie.wsgi --chdir /usr/src/app/subscribie/
+exec uwsgi --http :5000 --workers 1 --threads 2 --py-call-uwsgi-fork-hooks --wsgi-file subscribie.wsgi --touch-chain-reload subscribie.wsgi --chdir /usr/src/app/subscribie/
 
diff --git a/pyproject.toml b/pyproject.toml
index 72bd07b57..f3dfecf61 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,6 +39,7 @@ dependencies = [
     "scikit-learn",
     "black",
     "strictyaml",
+    "sentry-sdk[flask]>=2.14.0",
 ]
 readme = "README.md"
 requires-python = ">= 3.12"
diff --git a/requirements-dev.lock b/requirements-dev.lock
index 3d15330bc..3615bbdb0 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -22,9 +22,11 @@ black==24.4.2
 blinker==1.8.2
     # via flask
     # via flask-mail
+    # via sentry-sdk
     # via subscribie
 certifi==2024.2.2
     # via requests
+    # via sentry-sdk
 cffi==1.16.0
     # via cryptography
 charset-normalizer==3.3.2
@@ -50,6 +52,7 @@ flask==3.0.3
     # via flask-reuploaded
     # via flask-sqlalchemy
     # via flask-wtf
+    # via sentry-sdk
     # via subscribie
 flask-babel==4.0.0
     # via subscribie
@@ -96,6 +99,7 @@ mako==1.3.5
 markupsafe==2.1.5
     # via jinja2
     # via mako
+    # via sentry-sdk
     # via werkzeug
     # via wtforms
 mypy-extensions==1.0.0
@@ -148,6 +152,8 @@ scikit-learn==1.5.0
 scipy==1.13.1
     # via scikit-learn
     # via subscribie
+sentry-sdk==2.14.0
+    # via subscribie
 six==1.16.0
     # via python-dateutil
 smmap==5.0.1
@@ -172,6 +178,7 @@ tzdata==2024.1
     # via pandas
 urllib3==2.2.1
     # via requests
+    # via sentry-sdk
 werkzeug==3.0.3
     # via flask
 wheel==0.43.0
diff --git a/requirements.lock b/requirements.lock
index 3d15330bc..3615bbdb0 100644
--- a/requirements.lock
+++ b/requirements.lock
@@ -22,9 +22,11 @@ black==24.4.2
 blinker==1.8.2
     # via flask
     # via flask-mail
+    # via sentry-sdk
     # via subscribie
 certifi==2024.2.2
     # via requests
+    # via sentry-sdk
 cffi==1.16.0
     # via cryptography
 charset-normalizer==3.3.2
@@ -50,6 +52,7 @@ flask==3.0.3
     # via flask-reuploaded
     # via flask-sqlalchemy
     # via flask-wtf
+    # via sentry-sdk
     # via subscribie
 flask-babel==4.0.0
     # via subscribie
@@ -96,6 +99,7 @@ mako==1.3.5
 markupsafe==2.1.5
     # via jinja2
     # via mako
+    # via sentry-sdk
     # via werkzeug
     # via wtforms
 mypy-extensions==1.0.0
@@ -148,6 +152,8 @@ scikit-learn==1.5.0
 scipy==1.13.1
     # via scikit-learn
     # via subscribie
+sentry-sdk==2.14.0
+    # via subscribie
 six==1.16.0
     # via python-dateutil
 smmap==5.0.1
@@ -172,6 +178,7 @@ tzdata==2024.1
     # via pandas
 urllib3==2.2.1
     # via requests
+    # via sentry-sdk
 werkzeug==3.0.3
     # via flask
 wheel==0.43.0
diff --git a/settings.yaml.example b/settings.yaml.example
index 2f418867f..d353ad9db 100644
--- a/settings.yaml.example
+++ b/settings.yaml.example
@@ -6,6 +6,10 @@ FLASK_ENV: development
 # SESSION_COOKIE_HTTPONLY: True
 # SESSION_COOKIE_SAMESITE: None
 
+# Sentry_sdk_dsn
+SENTRY_SDK_DSN: "https://changeme@changeme.ingest.de.sentry.io/123456789"
+SENTRY_SDK_SESSION_REPLAY_ID: "changeme"
+
 # Software as a service (SAAS)
 SAAS_URL: https://subscribie.co.uk/
 # SAAS_API_KEY is to allow subscribie platform to send authenticated
diff --git a/subscribie/__init__.py b/subscribie/__init__.py
index 51d8ac647..e2b3cb57b 100644
--- a/subscribie/__init__.py
+++ b/subscribie/__init__.py
@@ -7,6 +7,7 @@
 
     :copyright: (c) 2018 by Karma Computing Ltd
 """
+import sentry_sdk
 from subscribie.settings import settings
 from .logger import logger  # noqa: F401
 import logging
@@ -25,6 +26,17 @@
     request,
     abort,
 )
+
+sentry_sdk.init(
+    dsn=settings.get("SENTRY_SDK_DSN"),
+    # Set traces_sample_rate to 1.0 to capture 100%
+    # of transactions for tracing.
+    traces_sample_rate=1.0,
+    # Set profiles_sample_rate to 1.0 to profile 100%
+    # of sampled transactions.
+    # We recommend adjusting this value in production.
+    profiles_sample_rate=1.0,
+)
 from flask_babel import Babel, _
 from subscribie.email import EmailMessageQueue
 from .Template import load_theme
@@ -378,4 +390,14 @@ def alert_subscriber_update_choices(subscriber: Person):
     def test_language():
         return _("Hello")
 
+    @app.route("/error")
+    def raise_error():
+        1 / 0  # raises an error
+        return ""
+
+    @app.route("/ui-error")
+    def raise_ui_error():
+        """Raises UI error"""
+        return render_template("errors/ui-error.html"), 200
+
     return app
diff --git a/subscribie/blueprints/admin/templates/admin/layout.html b/subscribie/blueprints/admin/templates/admin/layout.html
index ce890ee8f..42eccf2e4 100644
--- a/subscribie/blueprints/admin/templates/admin/layout.html
+++ b/subscribie/blueprints/admin/templates/admin/layout.html
@@ -8,6 +8,7 @@
 <link rel="stylesheet" href="{{ url_for('admin.static', filename='custom_style.css') }}">
 <link href="https://fonts.googleapis.com/css?family=Lato:900,400" rel="stylesheet">
 <script src="https://unpkg.com/htmx.org@2.0.2"></script>
+<script src="https://js-de.sentry-cdn.com/{{ SENTRY_SDK_SESSION_REPLAY_ID }}.min.js" crossorigin="anonymous"></script>
 
 {% if integration.google_tag_manager_container_id
    and integration.google_tag_manager_active
diff --git a/subscribie/settings.py b/subscribie/settings.py
index 5870a8f2c..512bf788a 100644
--- a/subscribie/settings.py
+++ b/subscribie/settings.py
@@ -1,4 +1,5 @@
 from strictyaml import load, Map, Email, Str, Url, Int, Bool, Regex, CommaSeparated
+import os
 
 # Load application settings according to schema
 
@@ -7,6 +8,8 @@
 schema = Map(
     {
         "FLASK_ENV": Str(),
+        "SENTRY_SDK_DSN": Str(),
+        "SENTRY_SDK_SESSION_REPLAY_ID": Str(),
         "SAAS_URL": Url(),
         "SAAS_API_KEY": Str(),
         "SAAS_ACTIVATE_ACCOUNT_PATH": Str(),
@@ -57,6 +60,10 @@ def load_settings():
     with open("settings.yaml") as fp:
         settings_string = fp.read()
         settings = load(settings_string, schema)
+        for key in schema._required_keys:
+            if key in os.environ:
+                print(f"Overriding setting {key} with environ value: {os.getenv(key)}")
+                settings[key] = os.getenv(key)
         return settings
 
 
diff --git a/subscribie/themes/theme-jesmond/jesmond/errors/ui-error.html b/subscribie/themes/theme-jesmond/jesmond/errors/ui-error.html
new file mode 100644
index 000000000..15859d5ca
--- /dev/null
+++ b/subscribie/themes/theme-jesmond/jesmond/errors/ui-error.html
@@ -0,0 +1,10 @@
+{% extends "layout.html" %}
+
+{% block body %}
+<script>
+    window.onload = () => {
+        throw new Error('This is a test error');
+    };
+</script>
+
+{% endblock %}
\ No newline at end of file
diff --git a/subscribie/themes/theme-jesmond/jesmond/layout.html b/subscribie/themes/theme-jesmond/jesmond/layout.html
index 2437ce134..32cfe9554 100644
--- a/subscribie/themes/theme-jesmond/jesmond/layout.html
+++ b/subscribie/themes/theme-jesmond/jesmond/layout.html
@@ -7,6 +7,7 @@
 <link rel="stylesheet" href="/static/style.css">
 <link href="https://fonts.googleapis.com/css?family=Lato:900,400" rel="stylesheet">
 <script src="https://js.stripe.com/v3/"></script>
+<script src="https://js-de.sentry-cdn.com/{{ SENTRY_SDK_SESSION_REPLAY_ID }}.min.js" crossorigin="anonymous"></script>
 <script type="text/javascript" src="https://code.jquery.com/jquery-3.0.0.js" integrity="sha256-jrPLZ+8vDxt2FnE1zvZXCkCcebI/C8Dt5xyaQBjxQIo=" crossorigin="anonymous"></script>
 {% if custom_code != "None" %}
 <!-- custom code -->
diff --git a/subscribie/views.py b/subscribie/views.py
index eafa883f5..e08aae2ad 100644
--- a/subscribie/views.py
+++ b/subscribie/views.py
@@ -150,12 +150,14 @@ def check_if_inside_iframe():
 
 @bp.app_context_processor
 def inject_template_globals():
+    from subscribie.settings import settings as internal_settings
     company = Company.query.first()
     integration = Integration.query.first()
     plans = Plan.query.filter_by(archived=0)
     pages = Page.query.all()
     settings = Setting.query.first()
     custom_code = settings.custom_code
+    SENTRY_SDK_SESSION_REPLAY_ID = internal_settings.get("SENTRY_SDK_SESSION_REPLAY_ID")
     geo_currency_symbol = get_geo_currency_symbol()
     default_currency_symbol = get_shop_default_currency_symbol()
     currency_format = currencyFormat
@@ -166,6 +168,7 @@ def inject_template_globals():
         plans=plans,
         pages=pages,
         custom_code=Markup(custom_code),
+        SENTRY_SDK_SESSION_REPLAY_ID=SENTRY_SDK_SESSION_REPLAY_ID,
         geo_currency_symbol=geo_currency_symbol,
         get_geo_currency_code=get_geo_currency_code,
         default_currency_symbol=default_currency_symbol,