Problem upgrading v0.26 to v0.26b

[just4t]

Error upgrading from v0.25 to v0.26

Those ones could be of help: Old management deamon without virtualenv still running after upgrade and/or v0.26 - Let’s Encrypt won’t work (Certbot problem), can’t install, the same applies to upgrading.

• And fixed today ,on dev. master. see changelog