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I’m getting this error, any ideas?

/vagrant (master)]$ bundle exec rake db:migrate
ln: failed to create symbolic link `/vagrant/public/plugins/emoji': Protocol error
/vagrant/lib/validators/email_validator.rb:25: warning: regular expression has ']' without escape
rake aborted!
SyntaxError: /vagrant/lib/validators/email_validator.rb:25: syntax error, unexpected $undefined
    /^[a-zA-Z0-9!#$%&'*+\/=?\^_`{|}~\-]+(?:\.[a-...
                   ^
/vagrant/lib/validators/email_validator.rb:25: syntax error, unexpected $undefined, expecting keyword_end
...`{|}~\-]+(?:\.[a-zA-Z0-9!#$%&'\*+\/=?\^_`{|}~\-]+)*@(?:[a-zA...
...                               ^
unmatched close parenthesis: /=?\^_`{|}~\-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9\-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9\
-]*[a-zA-Z0-9])?$/