launching jupyter notebook error

/Users/ricky321u/anaconda3/bin/jupyter_mac.command ; exit;
Failed to execute process '/Users/ricky321u/anaconda3/bin/jupyter_mac.command'. Reason:
exec: Exec format error
The file '/Users/ricky321u/anaconda3/bin/jupyter_mac.command' is marked as an executable but could not be run by the operating system.

maybe it cause because i've installed it before?
how could i fix it thank you

Start with the reported /Users/ricky321u/anaconda3/bin/jupyter_mac.command path and the operating system's "Exec format error" message. Check whether this issue is still reproducible with the supported Jupyter Notebook installation and document the environment details and a verified launch outcome; the issue does not name a repository file or test.

Written by the indexing model from the issue text.