How to fix "error Your Ruby version is 2.6.8, but your Gemfile specified 2.7.6" in React Native

I encountered this issue when I was trying to spin up a new React Native project. This is how I fixed it.

• First, update brew

brew update

• Use brew to install ruby-build

brew install ruby-build

• Use brew to install rbenv

brew install rbenv

• Then go ahead to install the rbenv version you need. In our case, it is version 2.7.6

rbenv install 2.7.6

• Next, set the new version to be global

rbenv global 2.7.6

• Finally, export the following configurations to define rbenv as default global ruby

echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.zshrc

• And

echo 'eval "$(rbenv init -)"' >> ~/.zshrc

Finally kill the terminal and restart it.
Now you can succesfully create a new React Native project.