cookies blocked

Can anyone help with this? Yesterday I installed the latest iMovie update. Afterwards when I went to my bank website I got a message that cookies were blocked. I have checked everywhere and I don't have them blocked for that website. Is there something I am missing.

iMovie was an update because of Catalina. I thought maybe it needed Catalina, so I downloaded and installed it after the fact. Problem persists. I had signed onto bank website hours before and no problem. Was also able to get to website on laptop with older version of iMovie and system, no problem. It has to be something in the iMovie update. What is the fix. I need help.