Custom File Upload Button and Checkbox of Bootstrap 4

[Rizwan-Raza]

Custom File Upload Button and Checkbox of Bootstrap 4 is not rendering properly.

At Homepage, in the top right of the Search box contain an issue of invisible checkbox.
After login, At the Sell tab, amenities checkbox are invisible as well as button for selecting property images.
At the profile edit for new avatar, file upload button UI issue.
At the property image addition and much more. Even all the file upload and checkbox which are custom in nature are getting issue in rendering.