To resolve the issue with Thunderbird 128.5.2 esr TBkeys-lite 2.3.0 add-on preventing the Calendar Pane from opening and the Calendar List window (mini-month view also not showing), you can try the following steps:
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Open Thunderbird and go to the Add-ons Manager (Tools > Add-ons or Ctrl+Shift+A).
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Search for "TBkeys-lite" in the search bar.
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Click on the TBkeys-lite listing.
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Click on the "Disable" button to disable the add-on temporarily.
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Restart Thunderbird.
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Check if the Calendar Pane and Calendar List window (mini-month view) are now working correctly.
If the issue persists, you can try the following:
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Reinstall TBkeys-lite add-on by clicking on the "Remove" button, then click on the "Find More Thunderbird Add-ons" link at the bottom, search for TBkeys-lite, and install the latest version.
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If the issue still persists, consider filing a bug report at https://bugzilla.mozilla.org/ with detailed steps to reproduce the issue.
Here are some references for further reading:
- Thunderbird: https://www.thunderbird.net/
- TBkeys-lite: https://addons.thunderbird.net/en-US/thunderbird/addon/tbkeys-lite/
- Filing a bug report: https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Bug_writing_guide
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