Are you missing an app in Bubble Cloud launcher which is otherwise available in the system app-list?
You might have accidentally hidden its icon. Try to enable the option “Show hidden bubbles”:
After turning on the option, please look in the app drawer, all hidden bubbles are shown for a few minutes. If you find it, long press on the bubble and change the weight (plus/minus buttons)
You can disable the option “Show hidden bubbles”, otherwise it will disable itself after a few minutes.