Hi,
Do you have a view override for the view "productmarket | form_image" ?
It looks like your upload is targeting "hikashop/upload" and not "hikamarket/upload".
This shouldn't be the case thanks to the parameter
'upload_base_url' => 'index.php?option=com_hikamarket&ctrl=upload',
I made some test in my local website and I couldn't reproduce the issue.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.