Adding a Single Page Application
From the Add a Client workflow, if you choose to setup a Single Page application, you will see a dialogue enabling you to add the following:
Client IDUnique identifierDisplay NameApplication name that will be seen on Consent ScreensDisplay URLApplication URL that will be seen on Consent ScreensLogo URLApplication Logo that will be seen on Consent Screens. Note - must be HTTPSDescriptionApplication description for use within AdminUI
Click next once all details have been filled in as required:

SPA Callback Url
You will be asked to enter a Callback URL, which is the endpoint where tokens will be sent to. This can be configured more after setup, and is the full path of the redirect URL. This must be over HTTPS:

SPA Logout Url
You will next be asked to enter a Post-Logout URL. This is optional and you can configure more after setup - it is where users can be returned to after logging out. This must be HTTPS:

SPA Identity Resources
You will next be asked to select the Identity Resources that this client can access:

SPA Protected Resources
At this point, you can now choose the Protected Resources that this client can access:

SPA Details Review
You will get the chance to finally review all details at the end of the application process, when you will see a summary of all details entered so far.

To edit, click the pencil icon and you will be returned to the page to amend those details. For instance, editing the Display Name will return you to the Basic Details
Back
If at any point after entering the basic details you wish to go back, you can navigate backwards and forwards within the application using the links at the foot of the modal, or cancel out of the entire process:

Success
Once clicking submit, you will have successfully added a SPA Client.
HTTPS
If the Logo URL, the application Logo that will be seen on Consent Screens, is not HTTPS, then it will not display.
The Callback URL and Logout URL must also be HTTPS.