Got a error "data.map is not a function" when I custom a transport.file.format.

[c0010c]

Version:5.1.5
Stack:
Unhandled electron-log error TypeError: data.map is not a function
at toString (D:\dev\webWS\game-rcsc-electron\node_modules\electron-log\src\node\transforms\object.js:63:33)
at D:\dev\webWS\game-rcsc-electron\node_modules\electron-log\src\node\transforms\transform.js:15:14
at Array.reduce ()
at transform (D:\dev\webWS\game-rcsc-electron\node_modules\electron-log\src\node\transforms\transform.js:13:21)
at transport (D:\dev\webWS\game-rcsc-electron\node_modules\electron-log\src\node\transports\file\index.js:74:21)
at Logger.processMessage (D:\dev\webWS\game-rcsc-electron\node_modules\electron-log\src\core\Logger.js:173:11)
at Logger.logData (D:\dev\webWS\game-rcsc-electron\node_modules\electron-log\src\core\Logger.js:129:10)
at [as info] (D:\dev\webWS\game-rcsc-electron\node_modules\electron-log\src\core\Logger.js:83:37)

[megahertz]

Could you show your logger initialization code?