The Dynatrace web UI displays customized HTTP error pages that describe likely reasons for the error and offer hints on how to proceed. See below for deeper insight into possible causes and resolutions.
401
HTTP 401 indicates you aren't authorized to view a particular resource. Most of the time, you'll get this error when a resource that was previously accessible anonymously now requires authentication. Sign in to your Dynatrace environment and try again. If you still don't have access, reach out to the resource owner.
403
In general, HTTP 403 error pages indicate lack of permission to access a Dynatrace environment or resources such as dashboards or management zones.
Access to environment
There are several reasons why you might not be able to access an environment:
If you can authenticate but you get a 403 error, make sure you are using the right environment URL.
Go to Account Management. If you have more than one account, select the account you want to manage.
Select License > Overview, which lists environments you have access to.
If you're sure you have the right environment, get in touch with your Dynatrace administrator and request environment permissions to access the environment.
Make sure you aren't trying to access a paid environment using a trial account.
If you are trying to access an environment after your trial has expired, or your trial environment was deactivated, ask your Dynatrace Sales contact to grant you access again.
Access to resources
If you can't access a dashboard that was shared with you, it probably means the dashboard sharing options don't allow you to access it. Contact a dashboard owner or the person who shared the dashboard and ask for access.
If you can't access an entity page that someone shared with you (for example, a host overview page), it probably means you don't have access to a management zone this entity is assigned to. Provide your Dynatrace administrator with the entity page URL and ask for management zones permissions to access this entity.
404
HTTP 404 indicates that the page you're trying to access doesn't exist. Likely possible reasons include:
The URL points to an application, host, process group, or service that is no longer available in your environment. Dynatrace data retention periods determine how long such information is available in your environment.
A colleague shared a resource in your Dynatrace environment and the resource no longer exists. It could be a custom dashboard, report, custom event for alerting definition, or extension that was removed from your environment.