This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

Thunderbird 52.8 freezes and will not open when Lightning 5.4 enabled

  • 4 valiny
  • 1 manana an'ity olana ity
  • 1 view
  • Valiny farany nomen'i Crogers70

Crogers70
Crogers70
more options

Hi, I have opened Thunderbird in safe mode and it works fine. I open Thunderbird with Lightning enabled and it just freezes, Task manager shows it as not responding and the CPU % goes up and down from 10 - 30% - the memory amount is 280MB. I then have to cancel the task to close the program. I have removed and installed Lightning but it does the same thing. I use the Thunderbird lightning calendar and sync it with my Sony phone using the MyPhoneexplorer add on, though with this add on removed and just the calendar enabled it will still not open. Any Ideas how to get my calendar back please.

Hi, I have opened Thunderbird in safe mode and it works fine. I open Thunderbird with Lightning enabled and it just freezes, Task manager shows it as not responding and the CPU % goes up and down from 10 - 30% - the memory amount is 280MB. I then have to cancel the task to close the program. I have removed and installed Lightning but it does the same thing. I use the Thunderbird lightning calendar and sync it with my Sony phone using the MyPhoneexplorer add on, though with this add on removed and just the calendar enabled it will still not open. Any Ideas how to get my calendar back please.

All Replies (4)

Crogers70
Crogers70 Tompon'ny fanontaniana
more options

Update - if thunderbird is left long enough it brings up the error Script: chrome://calendar/content/calendar-unifinder.js:895

either stopping or continuing does not open the Calender.

Can anyone help me please?

Wayne Mery
Wayne Mery
  • Moderator
  • Top 10 Contributor
more options

So you are saying this happens with BOTH lightning enabled and disabled?

Did you try https://support.mozilla.org/en-US/kb/safe-mode-thunderbird ?

Crogers70
Crogers70 Tompon'ny fanontaniana
more options

Hi, No, if lightning is enabled the script error occurs and no entries show in the Calendar or in the left hand pane. I get no errors with lightning disabled or run in safe mode but have no calendar or task function.

Novain'i Crogers70 t@

Crogers70
Crogers70 Tompon'ny fanontaniana
more options

My current fix has been to roll thunderbird back to version 52.7 and the calendar now opens and works. I have disabled the update function of thunderbird as assume the error is linked to the new version of thunderbird i was running. Lightning does not show a version compatible with thunderbird 52.8 on https://developer.mozilla.org/en-US/docs/Mozilla/Calendar/Calendar_Versions.

Novain'i Crogers70 t@