Hello,
The user download listing is only provided by commercial editions of HikaShop.
Because you're using HikaShop starter ; you should not have that feature available.
I think that you have the "downloads.xml" file present in your website while you it should not ; and because of that file you were able to create a menu for that page (when the rest of the code is missing).
We will see to patch HikaShop in order to not generate such kind of error for that page.
But if you really want to have listing of downloads, you can upgrade to HikaShop essential.
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.