Throws an error to console when the target element is not found. #217
Description
Throws an error to console when the target element is not found.
When there is no target element on the page, the popper appears, then when I click forward button, it throws an error to console.
Since it is not the previous element, it cannot find its style and gives an error.
https://github.com/pulsardev/vue-tour/blob/master/src/components/VStep.vue - Line 180
