CodeReady Containers - unsigned application

I wanted to start learning OpenShift on a local machine. I downloaded the CodeReady archive, unpacked it and put the binary file in /usr/local/bin.

After following the instructions for starting CodeReady Containers (first arc setup, then arc start) I managed to get my local OpenShift cluster. After that I stopped the cluster with the crc stop command and went to bed.

The next day< as soon as I launched the terminal, MacOs showed me a sign telling me that arc is an unsigned application and need to be removed.

Can you please tell me how to solve this problem?

MacBook Pro (16-inch, 2019)
macOS Catalina v. 10.15.7