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I imported info from Thunderbird on other computer. Now every time I open Thunderbird on the new laptop it says it can't reach my email server, incorrect login. If I enter my password it repeats the failure message. If I just close the message, the popup appears again, closing it again, it repeats once more, then closing it keeps it gone. Once I get the message to stop popping up by the repeat closings of the message, the related email account has already collected new emails so it was working. For what it's worth, the laptops are both Lenovo, the old is running Win10, the new Win11. Before the Import is was working fine, I only wanted to transfer my contacts, but the export grabbed everything. I don't have the issue on the original laptop I exported the info from.

Hi, am getting this error and am unable to use our new PC as this Thunderbird mail app is failing to migrate the profile from the other windows PC. Need your help asap on how to fix this. Not very technical, so need help. I updated Thunderbird to the latest version (115.11.0 32 bit) on my old PC before copying the profile over and loading Thunderbird on this new PC which has 115.11.0 64 bit version.

Uncaught (in promise) NS_ERROR_FILE_NOT_FOUND: Component returned failure code: 0x80520012 (NS_ERROR_FILE_NOT_FOUND) [nsIFile.copyTo]

   _recursivelyCopyMsgFolder resource:///modules/ThunderbirdProfileImporter.jsm:659
   _recursivelyCopyMsgFolder resource:///modules/ThunderbirdProfileImporter.jsm:668
   _mergeLocalFolders resource:///modules/ThunderbirdProfileImporter.jsm:641
   _importServersAndAccounts resource:///modules/ThunderbirdProfileImporter.jsm:250