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unif.Folder Error:NS_ERROR_FILE_ACCESS_DENIED)" location: "JS frame :: chrome://messenger/content/folderPane.js :: ftv_createVFFolder :: line 1214" data: no]?

after moving Thunderbird to a new computer (32 bit Windows 7 to 64 bit Windows 10) and upgrading to ver 45.5.1 unified folders cannot be selected anymore and the Error console shows the following entry: generator smart failed with exception: [Exception... "Component returned failure code: 0x80520015 (NS_ERROR_FILE_ACCESS_DENIED) [nsIMsgLocalMailFolder.createLocalSubfolder]" nsresult: "0x80520015 (NS_ERROR_FILE_ACCESS_DENIED)" location: "JS frame :: chrome://messenger/content/folderPane.js :: ftv_createVFFolder :: line 1214" data: no] How to correct this?

after moving Thunderbird to a new computer (32 bit Windows 7 to 64 bit Windows 10) and upgrading to ver 45.5.1 unified folders cannot be selected anymore and the Error console shows the following entry: generator smart failed with exception: [Exception... "Component returned failure code: 0x80520015 (NS_ERROR_FILE_ACCESS_DENIED) [nsIMsgLocalMailFolder.createLocalSubfolder]" nsresult: "0x80520015 (NS_ERROR_FILE_ACCESS_DENIED)" location: "JS frame :: chrome://messenger/content/folderPane.js :: ftv_createVFFolder :: line 1214" data: no] How to correct this?

Chosen solution

Problem solved: the folder ..../Mail/smart mailboxes was missing as they were at a location out of the profile folder from an earlier transfer. Moved them to the Mail folder within the actual profile, updated the absolute and the relative path in about:config and had to delete the files with .msf extension and now unified folders are working as expected.

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Chosen Solution

Problem solved: the folder ..../Mail/smart mailboxes was missing as they were at a location out of the profile folder from an earlier transfer. Moved them to the Mail folder within the actual profile, updated the absolute and the relative path in about:config and had to delete the files with .msf extension and now unified folders are working as expected.