Please help me solve this error

I am getting this error while trying to run server can anyone plz hlp me to solve this. This is the error
The file ‘views/node_modules/dropzone/dist/dropzone.css’ could not be found with < object at 0x7f63da09b670>.
i have already added the node_modules in all the available views folder in mayan but the error still comes. please help me to solve this