Vagrant Up Throws Undefined Method Error

Issue:

Seeing the following error when running ‘vagrant up’ on single-instance oracle vagrant file

undefined method `exists?' for class File (NoMethodError)

Cause:

Small but critical Ruby API change. Ruby’s File.exists? method has been deprecated for years and was removed in Ruby 3.2+.

✅ Correct method:

File.exist?

❌ But the vagrant-vbguest plugin being used is calling the old method:

File.exists? 

So the plugin fails when it tries to check for a file.

Solution:

Manually patch the line that throws the error:

1. open the file

   C:/Users/your_user/.vagrant.d/gems/3.3.8/gems/vagrant-vbguest-0.32.0/lib/vagrant-vbguest/hosts/virtualbox.rb
   

2. Find and change line 84

   - path && File.exists?(path)
   + path && File.exist?(path)
   

3. Save the file and rerun vagrant up.