Comment 22 for bug 1876286

I looked into upgrading from Ubuntu 18.04 to 20.04 but evidently that isn't an option until sometime in July. I tried to install the flatpack version and was able to get to all my email accounts again. Before trying this make sure to backup your current evolution data (File, Backup Evolution data ...). Then I followed the directions at the link below, make sure to follow the setup guide at the top:
https://flathub.org/apps/details/org.gnome.Evolution