I can't get gulp icons to run and I don't know why T-T

[cherry-wave]

Hello,

so. I have a config.json containing svg icons and I normally use "gulp icons" (clearing node_modules first and running npm install) and then the new icons are there. Yay. But now I tried this again after a month and I get this error, which doesn't really tell me what exactly is wrong and searching the webs didn't help. Do you have an idea?

[11:54:44] Using gulpfile Z:\work\my-project\gulpfile.js
[11:54:44] Starting 'icons'...
[11:54:45] 'icons' errored after 273 ms
[11:54:45] Error: Invalid filename
    at formatError (Z:\work\my-project\node_modules\gulp\node_modules\gulp-cli\lib\versioned\^4.0.0\format-error.js:20:10)
    at Gulp.<anonymous> (Z:\work\my-project\node_modules\gulp\node_modules\gulp-cli\lib\versioned\^4.0.0\log\events.js:31:15)
    at Gulp.emit (events.js:187:15)
    at Gulp.EventEmitter.emit (domain.js:442:20)
    at Object.error (Z:\work\my-project\node_modules\undertaker\lib\helpers\createExtensions.js:61:10)
    at handler (Z:\work\my-project\node_modules\now-and-later\lib\map.js:46:14)
    at f (Z:\work\my-project\node_modules\once\once.js:25:25)
    at f (Z:\work\my-project\node_modules\once\once.js:25:25)
    at tryCatch (Z:\work\my-project\node_modules\async-done\index.js:24:15)
    at done (Z:\work\my-project\node_modules\async-done\index.js:40:12)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! my-project@1.0.0 icons: gulp icons
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the my-project@1.0.0 icons script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\...\AppData\Roaming\npm-cache_logs\2020-10-27T10_54_45_255Z-debug.log
Process finished with exit code 1

I kinda got into the project without having many ideas of npm and gulp so if there is ANY information missing don't hesitate to ask. Because I don't know what is wrong here and what changed since my last try to generate icons I am a bit lost to see what I can provide to you, sorry for that.