**Description**

The "lots of circles" error page is very rough via Remote Desktop connections. In the current global pandemic many people are working remotely via already constrained connections. Needless redraws caused by the highly animated circles can cause frustrating slowdowns and sometimes lost connections.

**Use case / motivation**

It should be trivially simple to disable the animated portion of the error page and instead use a standard error page. Ideally this would be something easily achievable via configuration options and exposed in the Helm chart.

**Related Issues**

N/A

airflow/www/extensions/init_views.py
"""Initialize Experimental API"""
    if not conf.getboolean('api', 'enable_experimental_api', fallback=False):
        return
    from airflow.www.api.experimental import endpoints
    warnings.warn(
        "The experimental REST API is deprecated. Please migrate to the stable REST API. "
        "Please note that the experimental API do not have access control. "
        "The authenticated user has full access.",
        DeprecationWarning,
    )
    app.register_blueprint(endpoints.api_experimental, url_prefix='/api/experimental')
    app.extensions['csrf'].exempt(endpoints.api_experimental)