Read the statement by Michael Teeuw here.
Default Weather module still not displaying
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 @Jarhead96097 said in Default Weather module still not displaying: const notificationPayload = { currentWeather: this.weatherProvider?.currentWeatherObject?.simpleClone() ?? null,thats line 158 and159. the only thing i can think of is the ?. (optional chaining) operator… 
 but its been long supported… and it works on my 16.9.1 node versionsee item 2 in the list here 
 https://www.freecodecamp.org/news/how-the-question-mark-works-in-javascript/
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 @Jarhead96097 great news!!! 
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 @sdetweil Moin, line 159 of weather-js looks like this: currentWeather: this.weatherProvider?.currentWeatherObject?.simpleClone() ?? null,The pm2 error log shows: /home/<myusername>/.pm2/logs/MagicMirror-error.log last 50 lines: 1|MagicMir | failed to load swrast driver 1|MagicMir | [06.08.2022 09:46.00.374] [ERROR] WARNING! Could not load config file. Starting with default configuration. Error found: Error: The module '/home/lookyhere/MagicMirror/modules/MMM-PIR-Sensor/node_modules/epoll/build/Release/epoll.node' 1|MagicMir | was compiled against a different Node.js version using 1|MagicMir | NODE_MODULE_VERSION 73. This version of Node.js requires 1|MagicMir | NODE_MODULE_VERSION 107. Please try re-compiling or re-installing 1|MagicMir | the module (for instance, using `npm rebuild` or `npm install`).Looks like I should re-install. Which is the best method, in your opinion? 
 Many thanks for your help - I want to get this thing on the wall soon!
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 @sdetweil Hi Sam, Many thanks for the suggestion - I followed your advice on that page. Here’s what happened halfway through: from ../src/epoll.cc:11: /home/<myusername>/MagicMirror/modules/MMM-PIR-Sensor/node_modules/epoll/20.0.1/include/node/v8-ma ybe.h:106:45: error: ‘is_lvalue_reference_v’ is not a member of ‘std’; did you mean ‘is_lvalue_ reference’? 106 | template <class U, std::enable_if_t<!std::is_lvalue_reference_v<U>>*> | ^~~~~~~~~~~~~~~~~~~~~ | is_lvalue_reference /home/<myusername>/MagicMirror/modules/MMM-PIR-Sensor/node_modules/epoll/20.0.1/include/node/v8-ma ybe.h:106:66: warning: logical not is only applied to the left hand side of comparison [-Wlogic al-not-parentheses] 106 | template <class U, std::enable_if_t<!std::is_lvalue_reference_v<U>>*> | ^ /home/<myusername>/MagicMirror/modules/MMM-PIR-Sensor/node_modules/epoll/20.0.1/include/node/v8-ma ybe.h:106:67: error: template argument 1 is invalid 106 | template <class U, std::enable_if_t<!std::is_lvalue_reference_v<U>>*> | ^ /home/<myusername>/MagicMirror/modules/MMM-PIR-Sensor/node_modules/epoll/20.0.1/include/node/v8-ma ybe.h:106:71: error: expected unqualified-id before ‘>’ token 106 | template <class U, std::enable_if_t<!std::is_lvalue_reference_v<U>>*> | ^ /home/<myusername>/MagicMirror/modules/MMM-PIR-Sensor/node_modules/epoll/20.0.1/include/node/v8-ma ybe.h:123:43: error: ‘is_lvalue_reference_v’ is not a member of ‘std’; did you mean ‘is_lvalue_ reference’? 123 | template <class T, std::enable_if_t<!std::is_lvalue_reference_v<T>>* = nullptr>and finally: ✖ MagicMirror Rebuild Failed An unhandled error occurred inside electron-rebuild node-gyp failed to rebuild '/home/<myusername>/MagicMirror/modules/MMM-PIR-Sensor/node_modules/epo ll'. Error: `make` failed with exit code: 2This will all mean a lot more to you than it does for me. 
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 @sdetweil And this is the final part of the error message, in bright red: at ModuleRebuilder.rebuildNodeGypModule (/home/<myusername>/MagicMirror/modules/MMM-PIR-Sensor /node_modules/magicmirror-rebuild/build/module-rebuilder.js:193:19) at processTicksAndRejections (node:internal/process/task_queues:96:5) at async Rebuilder.rebuildModuleAt (/home/<myusername>/MagicMirror/modules/MMM-PIR-Sensor/node _modules/magicmirror-rebuild/build/rebuild.js:180:9) at async Rebuilder.rebuild (/home/<myusername>/MagicMirror/modules/MMM-PIR-Sensor/node_modules /magicmirror-rebuild/build/rebuild.js:143:17) at async /home/<myusername>/MagicMirror/modules/MMM-PIR-Sensor/node_modules/magicmirror-rebuil d/build/cli.js:141:9
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 @Blackeye hm. 1st time I’ve seen his tools fail… @bugsounet any guidance 
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 @sdetweil yes epoll/20.0.1means it uses electron v20.0.1for MagicMirror instead of v19.x that why it crash.I’ll leave it up to you to explain it :) 
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 @Blackeye ok, heres a way around the problem fix MM install to have one new tool cd ~/MagicMirror npm install electron-rebuildfix MMM-PIR-Sensor cd ~/MagicMirror/modules/MMM-PIR-Sensor nano package.jsonscroll down to "scripts": { "postinstall": "node_modules/.bin/electron-rebuild -e ../../node_modules/electron" },change the postinstall line so it looks like this "scripts": { "postinstall": "~/MagicMirror/node_modules/.bin/electron-rebuild -e ../../node_modules/electron" },ctrl-o to save the updated package.json 
 ctrl-x to exit the editorthen npm installshould work correctly now I just tested this on my MM 2.20 version, on both my linux machine and my pi4 with bullseye 
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 @sdetweil said in Default Weather module still not displaying: ~/MagicMirror/node_modules/.bin/electron-rebuild -e …/…/node_modules/electron Yes! It installed correctly this time, so that change in the path did the trick. I did get some warnings however: npm WARN deprecated har-validator@5.1.5: this library is no longer supported npm WARN deprecated uuid@3.4.0: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain cir cumstances, which is known to be problematic. See https://v8.dev/blog/math-random for details. npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142So it is not quite a perfect solution, but it works! 
 Many thanks for the suggestions and the solution!

