I think you'll find the error message was added to events before the fix and is still there because there's no mechanism to remove it.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1846423 Title: Lightning: Cannot dismiss reminders. Got a VALUE parameter with an illegal type for property: VALUE=DURATION Status in Mozilla Thunderbird: Fix Released Status in thunderbird package in Ubuntu: Confirmed Bug description: Cannot dismiss reminders for a recurrence with exceptions. Calendar entries like this are generated: BEGIN:VALARM ACTION:DISPLAY DESCRIPTION:My recurrence TRIGGER;VALUE=DURATION:-PT120M X-LIC-ERROR;X-LIC-ERRORTYPE=PARAMETER-VALUE-PARSE-ERROR:Got a VALUE parame ter with an illegal type for property: VALUE=DURATION END:VALARM ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: xul-ext-lightning 1:60.8.0+build1-0ubuntu0.19.04.1 ProcVersionSignature: Ubuntu 5.0.0-29.31-generic 5.0.21 Uname: Linux 5.0.0-29-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.20.10-0ubuntu27.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: vectro 2004 F.... pulseaudio /dev/snd/controlC0: vectro 2004 F.... pulseaudio BuildID: 20190705212852 Channel: Unavailable CurrentDesktop: KDE Date: Wed Oct 2 17:50:39 2019 Extensions: extensions.sqlite corrupt or missing ForcedLayersAccel: False IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) IpRoute: default via 192.168.1.1 dev wlo1 proto dhcp metric 600 169.254.0.0/16 dev wlo1 scope link metric 1000 192.168.1.0/24 dev wlo1 proto kernel scope link src 192.168.1.14 metric 600 Locales: extensions.sqlite corrupt or missing PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=60.8.0/20190705212852 (In use) RunningIncompatibleAddons: False SourcePackage: thunderbird Themes: extensions.sqlite corrupt or missing UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/25/2018 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: L78 Ver. 01.43 dmi.board.name: 2101 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 16.3C dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvrL78Ver.01.43:bd01/25/2018:svnHewlett-Packard:pnHPProBook640G1:pvrA3009DD10303:rvnHewlett-Packard:rn2101:rvrKBCVersion16.3C:cvnHewlett-Packard:ct10:cvr: dmi.product.family: 103C_5336AN G=N L=BUS B=HP S=PRO dmi.product.name: HP ProBook 640 G1 dmi.product.sku: T4M40UT#ABA dmi.product.version: A3009DD10303 dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/1846423/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp