Did I mess up my Mac?

Hi, I'm new to Mac and I was installing a plugin for music production. It is a vst3 file. It comes with a command file, I tried to use the plugin in a program called FL Studio and it prompted an error that says " Apple could not verify "drum clone.vst3" is free of malware that may harm your Mac or compromise your privacy". I tried to enable it by going to privacy settings and click on the "Open Anyway" button but it didn't do anything. The plugin installation folder was in a zip file. The vst3 file and the command file named "REQUIRED_SETUP.command"

I assumed that it is used so that Mac would recognize the plugin but when I try to open that file in terminal it says the same error above. Now, my ignorant self tried to do a workaround and opened Terminal using the spotlight search and just copy and pasted the code inside the command file to terminal directly. The code inside is "CURRENT_LOCATION=$(dirname "$0")

cd "$CURRENT_LOCATION"

echo

echo "[drumclone setup]"

echo

echo "Clearing quarantine checks."

echo "Location: $CURRENT_LOCATION"

find "$CURRENT_LOCATION" -name 'drumclone*' -exec xattr -d com.apple.quarantine {} \; 2>/dev/null

echo

echo "Done."

"

now after hitting the return button on my keyboard, the terminal then showed this

"dirname: illegal option -- z

usage: dirname string [...]

[drumclone setup]

Clearing quarantine checks.

Location: 

Done."

It was later that I realized that the command code seems to tell the computer to use the current folder location of the command file. What I did is just copy pasted it to Terminal straight up. I don't know if that breaks something in the background without me knowing. Please help me understand what this return message from Terminal means.

I don't know what that means but it bothers me. Did I break my Mac without noticing it or is that something I should not worry about? Please help me have peace of mind. Thank you so much in advance.