It's probably the only task you have. That little icon show up any time something gets updated or removed, even if it's a task that already was remove or you don't have. It's more than likely one of the debuggers firing off but if it's not we're much more active in the discord plus we have find lists and walkthroughs that can help you with the gallery.
From what you've mentioned there's indeed plenty left to do. the current paid version has a number of quality of life improvements to help people getting stuck. Your not the first to be lost where you currently are. The next steps are:
-grab fishing rod from shed
-talk to mermaid until fishing spots open up.
-get cafe key from pond (where Bianca is)
-grab lighter from cafe
-Solve candle puzzle in library. Get key and open door.
-follow rabbit around in east woods. That'll get you to day 3.