Notebook execution failed at Notebook service with http status code - '200'

Hi aAmirkHan 

Thanks for using Fabric Community.

Can you please try to create a new notebook and then attach the lakehouse. Now try to run this notebook from the pipeline. If the issue still persists please do let me know. This way there wont be a grey out option and you can attach or detach the lakehouse.

Did you try to set the target lakehouse as the default lakehouse? Default lakehouse is identified by the pin icon.

You can refer to this link for more help

https://community.fabric.microsoft.com/t5/General-Discussion/Notebook-fails-with-error-200-when-run-from-Pipeline/m-p/3756263#M5024

Hope this helps.