[Solved] target runtime was.base7 is not defined:

target runtime was.base7 is not defined:

Rootcause:
This issue will occur if you upload any new project to the workspace and the uploaded project requires some runtime environment which is not found.
Fix:

Right click on the project -> Properties -> Target Runtime -> Select the correct web sphere runtime version in the right side panel and click apply and restart the websphere.

Issue will be resolved now.
Thanks for reading!