Error on installing via upip

[nkgiovannivl]

Hello,

I'm having the next error during installing procedure:

import upip
upip.install("micropython-ulogger")
Installing to: /lib/
Warning: micropython.org SSL certificate is not validated
Installing micropython-ulogger 1.2 from https://files.pythonhosted.org/packages/d7/6a/7164a9dab4cadd573aad358c73673758fc89c0f2c005e2d8905cdaf66a1a/micropython-ulogger-1.2.tar.gz
Error installing 'micropython-ulogger': [Errno 22] EINVAL, packages may be partially installed

Thanks!

[majoson-chen]

try reflush your board