mprime for MacOS, bash_env: command not found

[congsz]

This is possibly a very silly question, but I couldn't solve it.
My problem is that, when I ran mprime v30.8b15 for MacOS for the 2nd time, it occurred an error: -bash: bash_env: command not found

A more detailed description of what I have done is listed in the following:

I installed mprime v30.8b15 for MacOS, successfully completed the first-time settings, and started doing first time PRP.
Then, I exited the program, edited "worktodo.txt" with a P-1 entry added in the front, like this:

[Worker #1]
Pminus1=(some assignment key),1,2,8940007,-1,2500000,2500000
PRP=(some assignment key),1,2,114506687,-1,77,0

I saved this file and attempted to re-run the program. I double clicked on mprime, and it says:

Last login: Tue Sep 13 11:31:22 on ttys000
You have new mail.
-bash: bash_env: command not found

The default interactive shell is now zsh.
To update your account to use zsh, please run 'chsh -s /bin/zsh'.
For more details, please visit https://support.apple.com/kb/HT208050.
(some device name):~ (some username)$ /Users/(some username)/Desktop/p95v308b15.MacOSX/mprime ; exit;

I closed it and re-opened it, but the same message occurred.

How can I solve this problem? I have never used MacOS before, and I have very little knowledge of zsh or bash. So I wish someone could present me with some easy-to-follow steps to deal with it.

Some computer info: MacOS Big Sur version 11.5.2, Processor: 2.3GHz dual-core Intel Core i5.

[S485122]

Did you try to follow the advice given in the error message and visit the site suggested ?

The default interactive shell is now zsh.
To update your account to use zsh, please run 'chsh -s /bin/zsh'.
For more details, please visit https://support.apple.com/kb/HT208050

It provides " easy-to-follow steps".
I won't guarantee it will solve your problem though.

[Uncwilly]

Originally Posted by congsz

This is possibly a very silly question, but I couldn't solve it.

You posted in 2 other threads with the same question. Please only post once. If it turns out to be in the wrong thread, the mods can move the post.

[congsz]

Originally Posted by Uncwilly

You posted in 2 other threads with the same question. Please only post once. If it turns out to be in the wrong thread, the mods can move the post.

OK, I will post only once per question in the future.
Sincere apologies for not knowing this rule before posting.
Admins can delete my posts in the other 2 threads as they wish.