You need to make sure that the binaries in Alfred.alfredpreferences/workflows/user.workflow.2F5864AB-253C-430B-A06F-44792254662B/cmd are allowed to be executed.

For me, MacOS Catalina has deleted the binaries when I tried to run them the very first time. What helped was executing them explicitly from finder, and going to system preferences → privacy & security and allow all 5 binaries to run.

This is because the developer has not signed them with Apple.

Wiki-Style creation of new pages is cool, but there is no tracking of changes. This means you can create a new page simply by referencing it right from your writing, e.g. I like [[JS]]. But should you later rename the JS page to JavaScript, any of your old reference will go awry, creating yet another new note called "JS".

Also automatic backlinks would be really helpful, to see where references are coming from.