TypeError when using python Crashlytics triggers

[blidd-google]

A customer is reporting a TypeError when attempting to use Crashlytics functions.

Reproduction Steps

# Welcome to Cloud Functions for Firebase for Python!
# To get started, simply uncomment the below code or create your own.
# Deploy with `firebase deploy`

from firebase_functions import https_fn
from firebase_functions.options import set_global_options
from firebase_functions import options
from firebase_admin import initialize_app

initialize_app()
set_global_options(cpu="gcf_gen1",max_instances=10)

# @https_fn.on_request()
# def on_request_example(req: https_fn.Request) -> https_fn.Response:
#     return https_fn.Response("Hello world!")


from firebase_functions.alerts import (
    crashlytics_fn,
)


@crashlytics_fn.on_regression_alert_published(memory=options.MemoryOption.MB_128,max_instances=100)
def example_regression(alert: crashlytics_fn.CrashlyticsRegressionAlertEvent) -> None:
    print(alert)


@crashlytics_fn.on_stability_digest_published(memory=options.MemoryOption.MB_128,max_instances=100)
def example_stability(alert: crashlytics_fn.CrashlyticsStabilityDigestEvent) -> None:
    print(alert)


@crashlytics_fn.on_velocity_alert_published(memory=options.MemoryOption.MB_128,max_instances=100)
def example_velocity(alert: crashlytics_fn.CrashlyticsVelocityAlertEvent) -> None:
    print(alert)

Error