Click the current language in the bootstrap5 template language selector goes to undefined

[handoyo]

Hi core devs,

We found out that when we click the current language in the bootstrap5 template language selector it goes to undefined page. It doesn't happen in the default template.

Is it a normal behavior or is it a bug?

I have attached a video of how i get the undefined page.

https://user-images.githubusercontent.com/225439/196757803-4d3e84eb-8711-4a21-a681-efecb86ab8e2.mp4

[BasaraABC]

Thank you @handoyo.