I have the exact same issue. I did a full reinstallation and sync and still the same issue. Also tried this;
You have error that a specific Umbrel App do not start or it keeps staying in “installing”, maybe the docker container for that app it wasn’t installed correctly or it hangs.
Step 1 - Enter using SSH into your Umbrel node:
Step 2 - stop Umbrel node with:
cd umbrel
sudo ./scripts/stop
Step 3 - clean / reconfigure the broken container:
sudo rm .env && sudo ./scripts/configure
Step 4 - apply latest Umbrel update (replace the version number with the latest):
sudo ./scripts/update/update --repo getumbrel/umbrel#v0.4.4
Restart your node:
sudo ./scripts/start
But no luck. This is the source Umbrel Troubleshooting Guide