Tried to publish a string but received an error

[hidari358]

Hi there, would like to ask why would I get this error when I try to publish a string? Here attached are the errors stated in command prompt:

SyntaxError: Unexpected token è in JSON at position 0
at JSON.parse ()
at exports.JsonTransform (C:\Users\user\test-nestjs\node_modules\nest-mqtt\dist\mqtt.transform.js:4:17)
at C:\Users\user\test-nestjs\node_modules\nest-mqtt\dist\mqtt.explorer.js:108:36
at Array.map ()
at MqttClient. (C:\Users\user\test-nestjs\node_modules\nest-mqtt\dist\mqtt.explorer.js:105:82)
at MqttClient.emit (events.js:311:20)
at MqttClient._handlePublish (C:\Users\user\test-nestjs\node_modules\nest-mqtt\node_modules\mqtt\lib\client.js:1162:12)
at MqttClient._handlePacket (C:\Users\user\test-nestjs\node_modules\nest-mqtt\node_modules\mqtt\lib\client.js:351:12)
at work (C:\Users\user\test-nestjs\node_modules\nest-mqtt\node_modules\mqtt\lib\client.js:283:12)
at Writable.writable._write (C:\Users\user\test-nestjs\node_modules\nest-mqtt\node_modules\mqtt\lib\client.js:294:5)

[longdratech]

pls add JSON.stringify into JSON.parse in mqtt.transform file