How do I stop getting these notifications?

Do I have a virus? They randomly started to pop up and all I usually download is Sims 4 custom content and since they started 2 itch.io games. How do I get them to stop and what are they !

Do I have a virus? They randomly started to pop up and all I usually download is Sims 4 custom content and since they started 2 itch.io games. How do I get them to stop and what are they !