error message when manually confirming an order

-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3.3.3
-- Error-message(debug-mod must be tuned on) -- : Error message

Error message
I'm using the AKeeba integration plugin:

When i try to manually confirm a check payment order i get the following message:
An error has occurred.
1146 Table 'seasonz2.oon_iproperty_agents' doesn't exist SQL=SELECT * FROM `oon_iproperty_agents` WHERE `user_id` = '112'

Also, do all orders have to be manually confirmed?
Please advise,

Hello,
Your issue is probably coming from an external extension/plugin, if you want more information about it a solution can be to :
- 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 you to understand from what your issue is coming.