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Frequently Asked Questions

Who can access Lightbend Academy?

We've opened access to all Lightbend Academy courses to the general public to support remote learning as much as possible. Normally available only to Lightbend subscribers, Lightbend Academy courses will be accessible to everyone through Summer 2020. After this, access to the course materials and commercial technologies will require a Lightbend subscription.

How do I get access to Lightbend Academy?

Lightbend Customers should continue to use your corporate registration link (see below for more information). Free users can learn more about how to register for a Lightbend Academy account on the following page:

Instructions for Lightbend Customers.

All customers with access to the Lightbend Portal will automatically have access to Lightbend Academy.

Additional Academy users will require a special registration link which is unique to your Lightbend subscription account. This link can be obtained by anyone who has access to the Lightbend Portal and can be freely shared with co-workers.

Please note, registration on will not grant you access to Lightbend Academy. The registration link found at must be used.

To ensure uninterrupted access to Lightbend Academy, please ensure you register using your corporate email address.

I already registered on How can I access Lightbend Academy?

If you previously registered on without using the appropriate registration link, then you can still use the registration link to enable access to Lightbend Academy.

I have taken similar courses on another platform, are the certificates and badges transferrable to Lightbend Academy?

The courses on Lightbend Academy are independent and the most up-to-date courses available. The Lightbend Academy courses have their own grades, badges, and certificates and are non-transferrable.

Can I invite others to Lightbend Academy?

Yes. You can share the registration link within your company. This will allow your co-workers to access the same premium content. While there are limits to the number of people who can access Lightbend Academy in any given account, the limits are sufficiently high that they shouldn’t be exceeded in most cases.

If you are concerned about exceeding your limits, please speak to your Lightbend sales representative.

Where can I find my Lightbend commercial credentials?

Once you have registered using your registration link, you can access your commercial credentials by going to:

Please ensure you read the instructions in detail to ensure your project is correctly configured.

Once I have registered, which course should I start with?

Lightbend Academy offers a variety of different courses, and at times the selection may seem overwhelming. To help you through the process, we have created a special course that will guide you through some of the training paths.

If you are unsure which course to start with, we recommend you start with our Getting Started course which will help to guide you on your journey.

Where can I download the slides?

At this time we do not offer a way to download the slides.

Can I retake a course to improve my grade and receive a course certificate or badge?

Our courses are designed with retries on many questions. It is intended to be forgiving. For this reason, it is our policy that we only allow a single attempt at each course. Please do your best on each course to ensure the greatest chance you can receive your course certificate and badge as grades are final.

Why does my dashboard indicate progress in some courses but not in others?

The dashboard shows progress exclusively for courses that include quizzes, exams and certificates. Progress is not tracked for courses that do not include quizzes, exams and certificates, therefore even though you may have completed the course, the dashboard will still indicate that the course can be resumed.


I didn't receive my verification email or I didn't receive my badge email.

In most cases, this is likely because the email has been caught by your spam/junk filter. Double check your spam/junk folder.

I am seeing an error that says: "This site requires a paid Lightbend subscription"

If you see this error, it usually indicates that you have tried to sign into, rather than Simply visit and sign in there instead (using the same credentials).

If you see this error while trying to access your Lightbend Credentials, you should be able to find a link to the credentials on the page. Otherwise, visit to obtain your credentials.

I am seeing a 500 error after verifying my email.

You may see this error if you try to verify your email address twice (i.e. you click the verification link twice). This means you are already verified and you can proceed to login to

I am seeing an error "Unable to create account"

This usually means that you already have an account on and you are trying to create a new account using the same email address.

You can usually resolve this issue by logging into the existing account ( then following the registration link for the Lightbend Academy. This will link the two accounts.

If you have forgotten your password, then you can use the "Forgot Password" option when you try to login.

I am seeing an error while trying to access the Lightbend Academy with my existing Lightbend account

Your existing account for may not be linked to the Lightbend Academy.

You may need to login to your existing account through and then follow your corporate registration link, or the free Academy link (See above). This will link your existing account with the Lightbend Academy.

I am getting "Cinnamon" errors while trying to compile and/or run tests.

These errors will show up something like the following:

	[error] sbt.librarymanagement.ResolveException: unresolved dependency: com.lightbend.akka#akka-diagnostics_2.13;1.1.12: not found
	[error] unresolved dependency: com.lightbend.cinnamon#cinnamon-akka_2.13;2.13.1: not found
	[error] unresolved dependency: com.lightbend.cinnamon#cinnamon-jvm-metrics-producer;2.13.1: not found
	[error] unresolved dependency: com.lightbend.cinnamon#cinnamon-prometheus;2.13.1: not found
	[error] unresolved dependency: com.lightbend.cinnamon#cinnamon-prometheus-httpserver;2.13.1: not found

When this happens, it usually means that you have not setup your commercial credentials. There should be instructions in the course that explain how to setup your credentials, including a video demonstration.

You can also refer to the section above entitled: "Where can I find my Lightbend commercial credentials?"