antivirus one "quit unexpectedly" and cannot reopen afterwards

Hello,

I purchased Cleaner One Pro & Antivirus One from the app store for my 2023 MacBook Air. I was able to download and use the Cleaner One Pro without an issues and initially I was able to download the Antivirus One and open it. However, as soon as I start any scan (smart scan or quick scan) the app will "quit unexpectedly" and I am not able to re-open it again with the same error message.

I have deleted the Antivirus One App files and re-downloaded it so I am able to open the program again. And I am able to click on all the other tabs but as soon as I scan, the program crashes again.

I am using a macOS Sonoma 14.2 now (the same issue was occurring when I had the macOS Ventura 13.3) . I have checked the app store and with no updates pending / indicated.

Please advise as to how I can get this paid subscription product to work.

Thank you!