Brands couldn't display normally in backend

-- HikaShop version -- : 3.1.1
-- Joomla version -- : 3.7,.5
-- PHP version -- : 7.0.15
-- Browser(s) name and version -- : IE,firefox,etc...

Dear Sir,
Brands couldn't display normally in backend.So I couldn't add or delete brand. Could someone know what is problem?
Thanks!
Screenshot:

Hello,

An error occurred but probably can't be displayed because the Joomla debug mode and Error reporting are disabled, can you :
- Activate the Joomla debug mode ("Administration->Global configuration->System->Debug System/Language")
- Set the "error reporting" option of the Joomla configuration to "maximum"
- Test it again so that you can see if it display an error message which will help us to understand from what your issue is coming.

Thank you.

Thanks Mohamed,
It displays a error when I set configuration of joomla:
"Invalid field: Redis Server Port"
Could you help me to make a test in website backend ? I will sent you a administrator info.
Many thanks!

Dear Nicolas,
Many thanks! Now Redis problem solved. I could set configuration now.
Then I found the error about Brands category:
"Fatal error: imagecreatefromjpeg(): gd-jpeg: JPEG library reports unrecoverable error: Not a JPEG file: starts with 0x89 0x50 in /var/www/html/administrator/components/com_hikashop/helpers/image.php on line 918"
Or could your login my website backend to have a check?
Many thanks!

OK,Found that .Many thanks for your help!