pi@raspberrypi:~/MagicMirror $ npm start

magicmirror@2.26.0 start
DISPLAY=“${DISPLAY:=:0}” ./node_modules/.bin/electron js/electron.js

[16.01.2024 19:51.34.090] [LOG] Starting MagicMirror: v2.26.0
[16.01.2024 19:51.34.111] [LOG] Loading config …
[16.01.2024 19:51.34.120] [DEBUG] config template file not exists, no envsubst
[16.01.2024 19:51.34.133] [LOG] Loading module helpers …
[16.01.2024 19:51.34.145] [LOG] No helper found for module: alert.
[16.01.2024 19:51.34.204] [ERROR] (node:29116) UnhandledPromiseRejectionWarning: Error: Cannot find module ‘command-exists’
Require stack:

• /home/pi/MagicMirror/modules/default/updatenotification/update_helper.js
• /home/pi/MagicMirror/modules/default/updatenotification/node_helper.js
• /home/pi/MagicMirror/js/app.js
• /home/pi/MagicMirror/js/electron.js
• /home/pi/MagicMirror/node_modules/electron/dist/resources/default_app.asar/main.js
• at Module._resolveFilename (node:internal/modules/cjs/loader:1082:15)
  at n._resolveFilename (node:electron/js2c/browser_init:2:117457)
  at Module._resolveFilename (/home/pi/MagicMirror/node_modules/module-alias/index.js:49:29)
  at Module._load (node:internal/modules/cjs/loader:927:27)
  at f._load (node:electron/js2c/asar_bundle:2:13330)
  at Module.require (node:internal/modules/cjs/loader:1148:19)
  at require (node:internal/modules/cjs/helpers:110:18)
  at Object. (/home/pi/MagicMirror/modules/default/updatenotification/update_helper.js:3:23)
  at Module._compile (node:internal/modules/cjs/loader:1269:14)
  at Module._extensions…js (node:internal/modules/cjs/loader:1324:10)
  at Module.load (node:internal/modules/cjs/loader:1124:32)
  at Module._load (node:internal/modules/cjs/loader:965:12)
  at f._load (node:electron/js2c/asar_bundle:2:13330)
  at Module.require (node:internal/modules/cjs/loader:1148:19)
  at require (node:internal/modules/cjs/helpers:110:18)
  at Object. (/home/pi/MagicMirror/modules/default/updatenotification/node_helper.js:4:22)
  (Use electron --trace-warnings ... to show where the warning was created)
  [16.01.2024 19:51.34.206] [ERROR] (node:29116) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
  ^C/home/pi/MagicMirror/node_modules/electron/dist/electron exited with signal SIGINT

I appreciate all help. THANKS !!!