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TB38.3.0, Lightning went missing from extensions. Reinstalling Lightning and updating to 38.4.0 has not helped. [was: My calendar disappeared]

  • 13 antwoorden
  • 5 hebben dit probleem
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  • Laatste antwoord van gutterman1223

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I have Thunderbird 38.3.0 on a Windows 7 PC. For some reason today my calendar with all my appointments just disappeared. When I went to the add-ons manager, Lightning was missing from my extensions. I didn't remove it myself.

I tried reinstalling it. After restarting Thunderbird, Lightning was back in the list of extensions (version 4.0.4.1) but I still have no calendar and no "Today Pane" toggle button.

I tried removing and installing again. Still no joy. Help!!

I have Thunderbird 38.3.0 on a Windows 7 PC. For some reason today my calendar with all my appointments just disappeared. When I went to the add-ons manager, Lightning was missing from my extensions. I didn't remove it myself. I tried reinstalling it. After restarting Thunderbird, Lightning was back in the list of extensions (version 4.0.4.1) but I still have no calendar and no "Today Pane" toggle button. I tried removing and installing again. Still no joy. Help!!

Bewerkt door Wayne Mery op

Gekozen oplossing

This is what I'd try: Determine your profile folder via Troubleshooting Information.

At the top right of the Thunderbird window, click the menu button , then select Help > Troubleshooting Information > Profile folder > Open Folder.

This will open the profile in Windows Explorer.

Close Thunderbird.

Temporarily stop your anti-virus real-time scanner.

Navigate to the extensions subfolder, and locate a folder {e2fda1a4-762b-4020-b5ad-a41df1933103}. It is the Lightning extension. Delete that folder if it exists.

If there is a 'staged' folder delete it as well.

Start Thunderbird, and install Lightning again. For Thunderbird 38.4.0 the corresponding version of Lightning is 4.0.4.1.

If it did work this time, turn anti-virus back on.

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What is the status of Lightning in the Add-ons Manager? please provide a screenshot with the entry for Lightning visible. https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem

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It appears to be enabled, see attached.

Edit: I tried disabling, then enabling again. That did not work either. I've also tried restarting my PC.

Bewerkt door pikestaff op

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If you're still on Thunderbird 38.3.0 update to 38.4.0.

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Thunderbird has updated itself to 38.4.0 but still no calendar.

As a temporary solution I've started to use Google calendar. I don't really want to switch, but...

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pikestaff, Thank you for reporting this.

1. Immediately after startup, is anything related to calendar seen in tools | error console.

2. Does starting in safe mode, and then starting normally help? (please do #1 first)

https://support.mozilla.org/en-US/kb/safe-mode
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Hi Wayne, thank you for responding.

1. Messages in the error console include:

Could not read chrome manifest 'file:///C:/Program%20Files%20(x86)/Mozilla%20Thunderbird/chrome.manifest'. Could not read chrome manifest 'file:///C:/Users/Kevin/AppData/Roaming/Thunderbird/Profiles/aersevaj.default/extensions/%7Be2fda1a4-762b-4020-b5ad-a41df1933103%7D/chrome.manifest'. No chrome package registered for chrome://lightning/locale/lightning.properties No chrome package registered for chrome://lightning/locale/lightning.properties (yes, this appeared twice)

2. Starting in safe mode and then starting normally did not help. I looked at the error console again and got the same messages plus, in addition, two instances of:

No chrome package registered for chrome://calendar/skin/cal-icon32.png

Bewerkt door pikestaff op

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pikestaff, what language version do you have installed?

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Matt, I don't know for sure and I don't know where to find this information. However, I'm located in England and the only dictionary installed is English/United Kingdom. So I assume it's British English.

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Gekozen oplossing

This is what I'd try: Determine your profile folder via Troubleshooting Information.

At the top right of the Thunderbird window, click the menu button , then select Help > Troubleshooting Information > Profile folder > Open Folder.

This will open the profile in Windows Explorer.

Close Thunderbird.

Temporarily stop your anti-virus real-time scanner.

Navigate to the extensions subfolder, and locate a folder {e2fda1a4-762b-4020-b5ad-a41df1933103}. It is the Lightning extension. Delete that folder if it exists.

If there is a 'staged' folder delete it as well.

Start Thunderbird, and install Lightning again. For Thunderbird 38.4.0 the corresponding version of Lightning is 4.0.4.1.

If it did work this time, turn anti-virus back on.

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That worked, thank you!

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I have the exact same messages/errors in the console as stated above. I have done this 3x now with TB 38.6. This is the 2nd time lightning calendar has just disappeared and the fix last time (found here: https://groups.google.com/forum/#!topic/mozilla.support.calendar/Ds0kNdPDNXY)

did not fix this time around. Since this is a newer version than the original poster's with same issue, is there something else I can try? I use this calendar for business and cannot afford to lose it.
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gutterman1223,

please start a new thread for your problem. Provide as many details as possible.

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Thanks for responding. I did start a new thread here:

https://support.mozilla.org/en-US/questions/1113939

If you need more info, let me know.