ubuntu@ip-172-31-43-202:~$ brew update
Already up-to-date.
ubuntu@ip-172-31-43-202:~$ brew doctor
Your system is ready to brew.
brew tap homebrew/science
==> Tapping homebrew/science
Cloning into '/home/linuxbrew/.linuxbrew/Library/Taps/homebrew/homebrew-science'...
remote: Counting objects: 638, done.
remote: Compressing objects: 100% (634/634), done.
remote: Total 638 (delta 1), reused 66 (delta 0), pack-reused 0
Receiving objects: 100% (638/638), 557.11 KiB | 0 bytes/s, done.
Resolving deltas: 100% (1/1), done.
Checking connectivity... done.
Error: Invalid formula: /home/linuxbrew/.linuxbrew/Library/Taps/homebrew/homebrew-science/sortmerna.rb
invalid attribute for formula 'homebrew/science/sortmerna': version (nil)
Error: Cannot tap homebrew/science: invalid syntax in tap!
