If at your map lands location got unlock u can get stick, Apple and some slime.if the lands still not unlock there are mission that tell us to clean slime that make yumiko hot springs place,then just follow the story.
Well just ignore it,that just event when Mayu So Excited when we ask help to build room for ryoko,its not crash anything,u can play like normal after ignore the eror.
If on map u dint unlock the second lands,there mission its say bring ryoko to natsuki place at afternoon,a event got trigger,later on map click the second lands,u need wait the event end,after all that event alr done u can go back and got yellow flower and the Necklace at same time.
