What you are describing by the label changing to [*] is the normal process when you execute cells. If things fail and give no output then you have a problem with the previous step.
You aren’t providing much for anyone to help you.
Please read Getting good answers to your questions and follow that and suggestions at How do I ask a good question? as guides to how to post on this and such forums.
Importantly, screenshots of tiny bits of a notebook aren’t a way to make such a post.
Screenshots in general are frowned upon.
If the code triggering the issue is consistent and other code runs and never causes a problem then it is a problem with that code or how many computational resources it needs.