Troubleshooting a wake-up alarm

Phew! First couple days with node-red and I'm mostly converted over as far as my mission critical functions. I imported a wake-up alarm from here: https://www.wouterbulten.nl/blog/tech/custom-wake-up-light-with-node-red/

But while the 1% turn on works, the get/increase light setting does not.
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This is the error I get: 7/12/2019, 9:25:02 AMnode: Get new light settingmsg : string[55]

"Error get-template: Request failed with status code 500"

Thanks for any help!

what is the (readable) debug output of the 1 minute loop and what does the Get new light setting node accept as input ?

Hopefully I'm doing this right. Here's debug output from 1 minute loop:
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I don't know how to answer your second question, sorry (do you mind directing me how to do so?)