[SOLVED] Meteor doesn't start on Win10

Hello,
After a fresh install, on first ‘meteor’ command, we obtain
W20191127-10:42:53.183(1)? (STDERR) C:\Users\seb.DIA-LOG\AppData\Local.meteor\packages\meteor-tool\1.8.2\mt-os.windows.x86_64\dev_bundle\server-lib\node_modules\fibers\fibers.js:90
W20191127-10:42:53.185(1)? (STDERR) return fn.apply(this, arguments);
W20191127-10:42:53.186(1)? (STDERR) ^
W20191127-10:42:53.186(1)? (STDERR)
W20191127-10:42:53.186(1)? (STDERR) TypeError: Cannot read property ‘indexOf’ of undefined
W20191127-10:42:53.187(1)? (STDERR) at babel-runtime.js (packages\babel-runtime.js:31:26)
W20191127-10:42:53.187(1)? (STDERR) at fileEvaluate (packages\modules-runtime.js:336:7)
W20191127-10:42:53.188(1)? (STDERR) at Module.require (packages\modules-runtime.js:238:14)
W20191127-10:42:53.188(1)? (STDERR) at require (packages\modules-runtime.js:258:21)
W20191127-10:42:53.189(1)? (STDERR) at packages\babel-runtime.js:53:15
W20191127-10:42:53.189(1)? (STDERR) at packages\babel-runtime.js:58:3
W20191127-10:42:53.189(1)? (STDERR) at V:\zDEV\Meteor\contact.meteor\local\build\programs\server\boot.js:398:38
W20191127-10:42:53.190(1)? (STDERR) at Array.forEach ()
W20191127-10:42:53.190(1)? (STDERR) at V:\zDEV\Meteor\contact.meteor\local\build\programs\server\boot.js:226:21
W20191127-10:42:53.191(1)? (STDERR) at V:\zDEV\Meteor\contact.meteor\local\build\programs\server\boot.js:461:7
=> Exited with code: 1
=> Your application is crashing. Waiting for file change.

We found many messages in forum with this kind of error, but without solution.

We do the same install on a ‘small laptop’ win10 system (the same last version : 1909-nov 2019) without problem!!!
Thank you for your advices,
JR

I’m stupid.
The problem was that the project folder was created on a mapped disk : moved on local unit, no problem!