Unable to upload datasets on Talend Data Prep

[AbdullahMastan]

Greetings, 

I am unable to upload any of my datasets to Talend Data Prep (localhost:9999). 

I tried upload a csv and an excel, unfortunately both failed with the following popup.

The data I'm uploading:

NOTE: I uploaded this just for trial since it wasn't working with excel. 

@Denis_Segard Please provide your valueable assistance. 

[Denis_Segard]

Hello,

A HAR trace may help to understand what is the problem : 

https://community.qlik.com/t5/Official-Support-Articles/How-to-generate-a-HAR-trace-for-issues-with-...

Kind regards
Denis

[AbdullahMastan]

How do I interpret the HAR? I am unable to deduce anything out of it. 

Below is something I got from the console of Inspect. 

angular.js:15739 Possibly unhandled rejection: {"data":{"code":"TDP_API_UNABLE_TO_CREATE_DATASET",

"defaultMessage":"An error has occurred during the import.","message":"An error has occurred during the import.",

"messageTitle":"Import error","context":{},"stacktraceDisplayed":true},"status":400,

"config":{"method":"POST","transformResponse":[null],"jsonpCallbackParam":"callback",

"url":"/gateway/upload/api/datasets?name=custs&size=10",

"headers":{"Content-Type":"text/plain","Accept":"application/json, text/plain, */*","Accept-Language":"en-US","X-Sharing-Provider":"legacy","X-Dataset-Provider":"legacy"},"data":{},"withCredentials":true},"statusText":"","xhrStatus":"complete"}

[Denis_Segard]

Hello,

Could you upload the HAR trace file ? 
Kind regards
Denis

[AbdullahMastan]

Please find the attached

[Denis_Segard]

Hello,
In the HAR trace , we can see the HTTP request used to upload the file fails with an HTTP 400 : 

Did you check in the Data Prep log files if there are some errors ? 

Kind regards
Denis

[AbdullahMastan]

I checked, yet again, I am unable to interpret anything. 

I have attached the log for your reference.

[AbdullahMastan]

Hey @Denis_Segard, any comments. Haven't been able to resolve it yet.