I had a similar problem on Fedora 26 which seems to have gone away after I killed the evolution-calendar-factory process.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to evolution in Ubuntu. https://bugs.launchpad.net/bugs/1745619 Title: Failed to open local calendar with "Timeout was reached" Status in evolution package in Ubuntu: New Bug description: After booting into a GNOME session, Evolution was started. Mail appeared as expected. When the Calendar section was opened, none of the calendars opened including the local calendar. A blue report was printed under the toolbar with the error that it could not open the local calendar as "Timeout was reached." It seems odd that there should be a timeout issue when accessing local data. The local calendar is stored on the save drive and mount point as the OS and Evolution. Closing and reopening Evolution did not resolve the issue. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: evolution 3.26.1-1 ProcVersionSignature: Ubuntu 4.13.0-31.34-generic 4.13.13 Uname: Linux 4.13.0-31-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 CurrentDesktop: GNOME Date: Fri Jan 26 09:12:29 2018 EcryptfsInUse: Yes ExecutablePath: /usr/bin/evolution InstallationDate: Installed on 2017-08-12 (166 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: evolution UpgradeStatus: Upgraded to artful on 2017-10-21 (96 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/evolution/+bug/1745619/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp