Read the statement by Michael Teeuw here.
SEMS portal MM-GoodWe Error Sep 2026
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Hi,
MMM-GoodWe module is failing with error as attached. It on started a week ago.
I am attaching the error below.
Can any please help.
Thank You.

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@nkc when MagicMirror starts up the console log displays a section with runtime info. Could you post that?
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@sdetweil Runtime Info attached for the module;

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@nkc great, thanks will look into it
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@nkc where can I find that module? not on Github, not in our 3rd party list
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@msimon360 thx… looked up by name… weird…
anyhow
sendSocketNotifcation uses json.stringify/parse under the covers… both are sensitive to data structure nestingi would guess there is a json bug…
the code is in the node helper
fetch(getInfoUrl, options).then((res) => { if (res.ok) { console.log(`\x1b[32m[SEMS-API][${res.status}] - Received Solar Data\x1b[0m`); <--- this came out in the debug return res.json(); } else { console.log(`\x1b[31m[SEMS-API] - Something went wrong\x1b[0m`); } }).then((data) => { // return the data part of the api response self.sendSocketNotification("SOLAR_DATA", data["data"]); <-- looks like the error spot... no data validation was done from receipt to here })
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