[GRASS-user] cannot install extension on Windows 10

[Mira Kattwinkel]

Dear list,

I cannot install extensions in a new and clean GRASS 7.6.0 installation 
on Windows 10, because the list of extensions is empty.

g.extension-l

results in:

List of available extensions (modules):

Fetching list of modules from GRASS-Addons SVN (be patient)...

(Mon Apr 15 16:54:16 2019) Command finished (10 sec)


For example g.extension extension=r.hydrodem operation=add

results in:

Downloading precompiled GRASS Addons <r.hydrodem>...

Updating addons metadata file...

ERROR: Unable to read addons metadata file from the remote server: 
[Errno socket error] [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify 
failed (_ssl.c:661)

WARNING: NO addons metadate available. Addons metadate file not updated.

Installation of <r.hydrodem> successfully finished (it is not!)


Can anybody please help me out?

All the best, Mira

-- 
Dr. Mira Kattwinkel
Quantitative Landscape Ecology
Institute for Environmental Sciences
University of Koblenz-Landau
Fortstraße 7
76829 Landau
Germany
Phone: + 49 6341 280-31553
Office: Building I, Room 2.02