Pantheon constantly changes the writable tmp folder location based on server load. This becomes a problem in the case of Views Data Exports with Batch mode set since the tmp files get lost along the way.
There’s a discussion related to this here:
https://www.drupal.org/project/views_data_export/issues/2352763
The solution is to override the vbo write directory from comment #3.
Run the following command in Devel PHP to fix.
variable_set('views_data_export_directory', 'public://views_plugin_display');