cq-editor startup: OpenGl_Window::CreateWindow: window Visual is incomplete: no depth buffer, no stencil buffer

I installed CQ-editor (Version: 0.1.0) on debian 9 (stretch) linux.

Installed in a conda environment with python 3.7:

root@debian1:/home/steve/apps# conda create --prefix ./cqeditor_conda python=3.7

When I run cq-editor, it does start and using **Run > Render** dispays the sample box ok.

But when cq-editor is starting, an error message is displayed in the bash window:

(cqeditor_conda)steve@debian1:~/apps$ cq-editor
Namespace(filename=None)
TKOpenGl | Type: Other | ID: 0 | Severity: Medium | Message:
OpenGl_Window::CreateWindow: window Visual is incomplete: no depth buffer, no stencil buffer

Is this a problem I need to worry about?

If so, how can I fix it?

Thanks **!!**