WaniKani has recently made some changes to the lesson page which caused some scripts to stop working. For the Advanced Context Sentence script, I have posted a fix in the respective thread:
The Community Mnemonics script is currently not maintained. It might still work if you enable the script compatibility mode, but that mode only delays the breaking change and will sooner or later also be updated.
Also, you posted this thread twice – maybe you should delete the duplicate thread.