Any issues with bootstrap 4?

[dr1021]

Is there any issues with this and Bootstrap 4. I have an application where I upgraded to bootstrap 4. I'm using a requireif in my model so that if a drop down is true, a text field is required. I view the source of the form, and all the markup appears, but no matter how many times I pick the value in the drop down, the text field never validates and you can leave it blank and still submit the form. I haven't replaced bootstrap 4 with a lower version as yet because of the amount of work it would take, but thought I would ask