Luban fails to open for 3d printing

As the topic says. 3d printing fails to open. I reload and try and try. fail every time. it will open for online browser but not with the app/luban. uninstalled reinstall and no luck. It will open for cnc and laser but no 3d printing. Help this is annoying.

Version?
Try a older version to double check.

The version is 4.5.0

I went back to 4.4…so far it’s working. That you