MMM-GooglePhotos: Stuck on loading...

Hello,

I know there are a few posts about this, but none with my error. The installation and configuration went fine, but ist stucks on Loading… In the mm-error.log I could find these:

[11.01.2024 13:08.38.675] [ERROR] (node:9072) UnhandledPromiseRejectionWarning: ReferenceError: fetch is not defined
    at Class.tryToIntitialize (/home/pi/MagicMirror/modules/MMM-GooglePhotos/node_helper.js:151:24)
    at process.processTicksAndRejections (node:internal/process/task_queues:96:5)
[11.01.2024 13:08.38.675] [ERROR] (node:9072) 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: 68)

In the mm-out.log, there is only this to find:

[11.01.2024 12:02.25.894] [LOG]   Module helper loaded: MMM-GooglePhotos
[11.01.2024 12:02.26.534] [LOG]   Connecting socket for: MMM-GooglePhotos

What to do? The credentials and token exists. Holger