threejs does not work

edit

When I execute plot3d(lambda u,v:(u^2+v^2)/4-2,(-2,2),(-2,2))

The Edge browser(firefox deb also) shows a blank space, only an ‘i‘ in the lower right corner. The browser console reports an error.

three.min.js:1 


        Failed to load resource: net::ERR_FILE_NOT_FOUND
tmp_fm1inkde.html:49  Uncaught ReferenceError: THREE is not defined
    at tmp_fm1inkde.html:49:17

jmol works well

plot3d(lambda u,v:(u^2+v^2)/4-2,(-2,2),(-2,2)).show(viewer='jmol')

I use sagemath9.5 installed by 'sudo apt install sagemath' on ubuntu23.04

How can I solve it?