CSS style sheet not working after uploading the file on server with filezilla

My project is done in laravel and vue.js, i have a separate css style sheets and all styles sheets are gulped into a common css style sheet. and it renders on production. Just after the production only some styles are working and most of the styles are not working, I use fileZilla to upload.

and all ccustomizations and configurations perfectly done. I guess something goes wrong in npm production. in local machine all styles are perfectly working.

I found the following question on stack overflow but nothing worked enter link description here

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