Precompile error during deployment

I'd like to deploy the rails app, but I got a precompilation error at the last stage, so I can't proceed.
I entered this command

 bundle exec rake assemblies:precompile RAILS_ENV=production

The error content is

/usr/bin/env:ruby 2.3: No such files or directories

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  

rake aborted!
Pass::SyntaxError: Invalid CSS after "color:": expected expression 
(e.g.1px, bold), was ";"
(sass): 1652

I could see that

So I have a question, but I have no idea where this error is, so where should I correct it?
I don't remember writing (e.g.1px,bold) and I don't have line 1652 in the css file.

I would appreciate it if you could let me know if you notice anything.
Also, what should I do to identify the problem is helpful.
Thank you m(._.)m