Problem with price access level

-- HikaShop version -- : 2.3.4

Hi,
A while ago I wrote about problem with back-end price for all products. Now i'm havinig problem with access levels for them. When i try to set it a white screen open, but with no options.
Any idea? Maybe some code is missig?

Hi,

Please set the Joomla error reporting level to "maximum", this should display an error if there is a fatal error.
Else, thanks to your browser console do you see any javascript error returned ?

I've set the Joomla error reporting but still nothing... white page.
About the browser console... i try different browsers and different pc and the result was the same...

Hi,

Please try to reinstall HikaShop over the current one, if it doesn't work so could you give us a backend access in order to see directly what's happening ?
You can give it via private message, please give the url of that topic in the message.

Thank you!
I have not touch anything in the files. For a while I used the free version and decided to go to business. After Install everything was fine. after a few days I started to add products and saw that there is no product prices in the back-end . I wrote in the forum and then you answer me that :
"For some reasons, the file "administrator/components/com_hikashop/views/product/tmpl/price.php" was empty instead of containing the code of the price listing on your website.
We've added the code as a template override in " /administrator/index.php?option=com_hikashop&ctrl=view&task=edit&id=1|isis|component|com_hikashop|product|price%2Ephp " and it's now working."
Until now I did not use price access level and I haven't noticed this problem.

Thank you
Have a nice day.