When SDK is launched from the Vivado version present in the SDx install, it is invoking SDx instead of SDK.
The invoked SDx tool is failing license checks for SDSoC and SDAccel, despite having the correct license.
If SDx is launched standalone, it passes the license checks once the necessary license is present and configured correctly.
This is a known issue and will be addressed in future releases of SDx.
To work around the license check, you can click on "cancel" to acquire the license.
This will allow you to proceed with SDK.