make sure your os display scaling is 100%
Its worked before with my resolution and even when i changed it, it still didnt work
reset your animate preferences.
google it for how
that didnt help also the strange thing is ive been using animate for months now and it just randomly did this out of the blue
did you confirm you successfully reset your preferences?
if no, don't do the following. just post that info so we can work on that.
if yes, uninstall (using the cc desktop app) and remove preferences (if given the option). then restart your computer and reinstall (do not use the preferences from previous installs if given the option).