Problem after adding the full screen addon

Full Screen Toggle addon

anki is stuck in full screen mode even after deleting the addon … more over the screen is turning off and on spontaneously every now and then… i had unchecked the hardware accelerator in the preferences section…the the blinking problem resolved but now i am not able to edit cards while reviewing them. an error pops up and ultimately anki closes

i had uninstalled anki then reinstalled it still the problem persists

pls help me :frowning: