U try restart ur device and update to latest version... check ur wifi and data speed to see is it fast enough ... else may need to uninstall and install but as u mention, boosters will be reset ... or , try on ur friend wifi ?
Events is not for all... it is for selected group and it may rotate among other groups ... so do wait for ur turn.... r u on phone device ? Usually phone device stand a better chance
U r very solid, strong ... the only way as of now is for u to scroll back and see ... but u have completed 120 chapter marked with 3*... so it should be ur chapter 121 issue ... complete chapter 121 and see whether is it marked with 3* and then see the stars again
Check ur Facebook account is the correct 1.... and check ur wifi and data speed is fast enough... restart ur device and update to latest version and try ...