Unable to Import or Export Magento 2.3

[silverkm]

Hey,

Newbie here - The other day I uploaded about 20 products via a CSV File to test. All went well. 

Today when I tried to upload more using the same template I get one of 2 errors at random: 

Empty column names 

and

Coping Source Failed

Double checked there are no trailing columns etc in the csv file etc... 

Figured I would just export it and see what might be happening - now I get error: 

Cannot write to the "/app/var/importexport_5c493145bb785" file. An error occurred during "" filePutCsv execution.

Really getting confused now

Appreciate any feedback. 

[Manish Mittal]

Hello @silverkm 

Export path should be var/ folder instead app/var. Please run below command to set permission for var folder:

sudo chmod -R 0777 var/

or it might be a .htaccess issue

[silverkm]

Think it may be a space issue. Just waiting to see if the fix works

[Manish Mittal]

@silverkm 

Okay check and let me know me if it works