ScratchAddons/ScratchAddons#7748 (comment)
I'm not sure if these are bugs with the library but the stop block includes the text {STOP_OPTION} for some reason and copying the translate blocks throws the error Cannot read properties of undefined (reading 'toScratchblocks') in the library.
These are issues with the parse-sb3-blocks library. All Scratch blocks are defined in this block mapping: {STOP_OPTION} is a placeholder for the stop block menu, for some reason the menu text is added after {STOP_OPTION} instead of replacing it, giving the text stop {STOP_OPTION} [all v] on this one block. We should create an issue on Apple's repo for this.
ScratchAddons/ScratchAddons#7748 (comment)