It would be helpful to get your graphic card detail as well. Unfortunately this is not just up to me. The issue in not in the Mecabricks code but the code of the 3D framework. Not too sure how and well it will be sorted but it will probably take some time.
I have people having luck by deactivating the hardware acceleration option in the browser however everything will run very slow.
If you cannot run this example here you unfortunately have the issue: https://threejs.org/examples/#webgl_materials_envmaps_pmrem_nodes

Chip Type: Intel(R) HD Graphics Family
DAC Type Internal
Adapter String: Intel(R) HD Graphics 620
Bios Information: Intel Video BIOS

This can help and I understand.

clear chache but always BLACK

Run https://threejs.org/examples/#webgl_materials_envmaps_pmrem_nodes
all black

https://moments.epic.net/#cat un THIS site IS all OK !!! webGL it works

HP Pavillion Notebook
Processor: Intel(R) Core(Tm) i7-7700HQ CPU @ 2.80GHz 2.81 GHz
Installed RAM:16.00 GB (15.9 G😎
Product ID: 00325-95800-00000-AAOEM
System Type: 64-Bit Operating System, x64 based Processor
Pen and Touch: No pen or touch imput
Version: WIN10 Home 1903
OS Build: 18362.592

Please give your specs in this post https://www.mecabricks.com/en/forum/topic/1740/1#post15406
I really need the graphic card (thanks Micdiaz2003) an the operating system.