Comment 79 for bug 1899485

After upgrading to Thunderbird 78.1.0, the same failure started to re-surface, there are two accounts configured on my system, one for my personal email and one for my corporate email. The corporate email account is configured to auto-complete from a LDAP server, whereas the personal account is not.

Attempting to send an email with either results in the following:

```javascript
Successfully loaded OTR library libotr-5.dll from C:\Program Files (x86)\Mozilla Thunderbird\libotr-5.dll OTRLib.jsm:43:13
NetworkError when attempting to fetch resource. IgnoreLists.jsm:90:10
[Exception... "Component returned failure code: 0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH) [nsIXPCComponents_Utils.readUTF8URI]" nsresult: "0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH)" location: "JS frame :: resource://gre/modules/L10nRegistry.jsm :: L10nRegistry.loadSync :: line 658" data: no] L10nRegistry.jsm:658:19
[Exception... "Component returned failure code: 0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH) [nsIXPCComponents_Utils.readUTF8URI]" nsresult: "0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH)" location: "JS frame :: resource://gre/modules/L10nRegistry.jsm :: L10nRegistry.loadSync :: line 658" data: no] L10nRegistry.jsm:658:19
Uncaught
Exception { name: "NS_ERROR_NOT_IMPLEMENTED", message: "Component returned failure code: 0x80004001 (NS_ERROR_NOT_IMPLEMENTED) [nsIMsgCompose.expandMailingLists]", result: 2147500033, filename: "chrome://messenger/content/messengercompose/MsgComposeCommands.js", lineNumber: 6970, columnNumber: 0, data: null, stack: "expandRecipients@chrome://messenger/content/messengercompose/MsgComposeCommands.js:6970:15\nGenericSendMessage@chrome://messenger/content/messengercompose/MsgComposeCommands.js:4365:5\nSendMessageWithCheck@chrome://messenger/content/messengercompose/MsgComposeCommands.js:4878:21\ndoCommand@chrome://messenger/content/messengercompose/MsgComposeCommands.js:994:9\ndoCommand@chrome://messenger/content/messengercompose/MsgComposeCommands.js:1157:9\ngoDoCommand@chrome://global/content/globalOverlay.js:101:18\noncommand@chrome://messenger/content/messengercompose/messengercompose.xhtml:1:12\n", location: XPCWrappedNative_NoHelper }
MsgComposeCommands.js:6970
An error occurred executing the cmd_sendWithCheck command: [Exception... "Component returned failure code: 0x80004001 (NS_ERROR_NOT_IMPLEMENTED) [nsIMsgCompose.expandMailingLists]" nsresult: "0x80004001 (NS_ERROR_NOT_IMPLEMENTED)" location: "JS frame :: chrome://messenger/content/messengercompose/MsgComposeCommands.js :: expandRecipients :: line 6970" data: no] globalOverlay.js:104
NS_ERROR_NOT_AVAILABLE: 2 ActivityManager.jsm:127
2020-08-13 09:19:57 gloda.collection ERROR caught exception from listener in onItemsModified: chrome://messenger/content/multimessageview.js:511: TypeError: tagsNode is null
Log4moz.jsm:766
2020-08-13 09:19:57 gloda.collection ERROR caught exception from listener in onItemsModified: chrome://messenger/content/multimessageview.js:511: TypeError: tagsNode is null

2020-08-13 09:19:57 gloda.collection ERROR caught exception from listener in onItemsModified: chrome://messenger/content/multimessageview.js:511: TypeError: tagsNode is null
Log4moz.jsm:766
2020-08-13 09:19:57 gloda.collection ERROR caught exception from listener in onItemsModified: chrome://messenger/content/multimessageview.js:511: TypeError: tagsNode is null

NS_ERROR_NOT_AVAILABLE: ActivityManager.jsm:127
```

So far, I have not managed to solve that problem, this installation of Thunderbird is not currently able to send any emails :/