Although it is a very old post, I recently experienced similar issue,
Has somebody found a solution for this ?
problem by managed_file filed type in tableform, back error ( Notice: Undefined index: fid_mobile in file_ajax_upload() (line 263 of ..\modules\file\file.module). )
I use
'fid_mobile' => array(
'#type' => 'managed_file',
'#required' => false,
'#upload_location' => 'public://',
'#multiple' => false,
'#upload_validators' => [
'file_validate_extensions' => ['png'],
'file_validate_size' => array (1024 * 1024 * 30),
],
),Active
1.2
Code
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Although it is a very old post, I recently experienced similar issue,
Has somebody found a solution for this ?