Reason Language Server not downloaded by coc-reason on M1/Apple Silicon Macs

[chrischen]

I run :CocInstall coc-reason in neovim.

No errors, except for this with :CocInfo

2021-04-25T02:01:10.061 ERROR (pid:24016) [extensions] - Error on active extension coc-reason: TypeError: (e.adapter || i.adapter) is not a function
    at e.exports (/Users/Chris/.config/coc/extensions/node_modules/coc-reason/lib/index.js:8:1961)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at async /Users/Chris/.config/coc/extensions/node_modules/coc-reason/lib/index.js:1:25124
    at async Object.h [as activate] (/Users/Chris/.config/coc/extensions/node_modules/coc-reason/lib/index.js:1:24811) TypeError: (e.adapter || i.adapter) is not a function
    at e.exports (/Users/Chris/.config/coc/extensions/node_modules/coc-reason/lib/index.js:8:1961)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at async /Users/Chris/.config/coc/extensions/node_modules/coc-reason/lib/index.js:1:25124

The .config/coc/extensions/node_modules/coc-reason/rls folder just has a file named CURRENT.

Is this something to do with the arm architecture not matching?