Custom theme assets not working

[dev.rohit]

I am adding custom theme assets like css and js but its giving me error like
i have tried so many things but nothing is working

I don't know why this is happening but when i adding velocity theme assets it's working fine.
What am I doing wrong? do I have to bundle my CSS and js file?

[Vaishali Agarwal]

@dev-rohit
please check this link if you're implementing custom theme
https://bagisto.com/en/create-custom-theme-in-bagisto/
https://forums.bagisto.com/topic/57/how-can-i-change-theme-and-write-own-html-for-front-end-section-not-the-admin-panel/13