cannot install using home-brew on MacOS10.15.7 with Xcode 12.4

[lionelmichaud]

I get the message:
Traceback (most recent call last):
brew extract or brew create and brew tap-new to create a formula file in a tap on GitHub instead.: Invalid usage: Non-checksummed download of swiftplantuml formula file from an arbitrary URL is unsupported! (UsageError)

[MarcoEidinger]

Damn, a couple of days ago this was working :( might be homebew 3.0.0 or I have the check-sum wrong. I will check

Please try to build from source in the meantime. Clone the repo, cd into cloned folder and then run brew install --build-from-source swiftplantuml.rb. This works for me on MacOS 11.1