I have just met with a similar user case... In File Explorer when right click file and choose Send To > Mail Recipient the attached error appears... It seems end-user had installed manually 91.x in parallel of 78.x on the machine. 91.x was removed. 78.x updated to 78.14.0 (32bits). Still the Send To feature still not working. Tried to remove re-install (x32bits) version. no luck. Removed x32bits version and installed 78.14.0 (64bits) en-gb instead no luck Removed 78.14.0 (64bits) en-gb, rebooted machine, re-installed 78.14.0 (64bits) en-us with advance option and set as default. no luck. Tried set default to Outlook and back to Thunderbird in Windows. no luck Tried set default app to Outlok in Windows, open TB, go to preference, check if default app, set it as default app (kept default option which include email). no luck Still cannot use the Sent To > Mail Recipient feature :-( Did I missed something to fix the issue? Or bug in TB?
Bug 1722256 Comment 6 Edit History
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I have just met with a similar user case... on Windows 10 Pro 20H2 [Version 10.0.19042.1237] machine... In File Explorer when right click file and choose Send To > Mail Recipient the attached error appears... It seems end-user had installed manually 91.x in parallel of 78.x on the machine. 91.x was removed. 78.x updated to 78.14.0 (32bits). Still the Send To feature still not working. Tried to remove re-install (x32bits) version. no luck. Removed x32bits version and installed 78.14.0 (64bits) en-gb instead no luck Removed 78.14.0 (64bits) en-gb, rebooted machine, re-installed 78.14.0 (64bits) en-us with advance option and set as default. no luck. Tried set default to Outlook and back to Thunderbird in Windows. no luck Tried set default app to Outlok in Windows, open TB, go to preference, check if default app, set it as default app (kept default option which include email). no luck Removed 78.14.0 (64bits) en-us and re-installed 78.14.0 (32bits) en-us with custom option and making use use TB as default checked marked in installer and reboot. no luck Upgrading to 21H1. no luck Still cannot use the Sent To > Mail Recipient feature :-( Did I missed something to fix the issue? Or bug in TB? Could 91.x version installed manually have set something in the registry that is not being cleaned up and causing the issue?