1054 - Unknown column 'a.price_users' in 'where clause'

Hello,

Please try perform a "check database" from your HikaShop backend configuration.
Displaying the error messages (or checking your PHP error log to see them) would help to get more details about the source of your SQL issue and the nature of your 500 error page.

Regards,

Hello,

So please check your PHP error log and your Server error log.
Without the error message related to the issue, it will be very difficult for us to provide a fix.

Due to the SQL error you got, I think your database is not up-to-date so you might got an error during the last update (when the "price_users" column has been added).
Afterwards, it might be require to perform the SQL modification manually (all the code is in the "install.hikashop.php" file) but you'll need to know from which version you performed the update.

Also, please check the file permission in your website to be sure that all files are up-to-date. If some files were "read only", the old version could still be there and it could also cause SQL errors.
You can also see to go directly in specific pages in HikaShop and try to avoid the HikaShop dashboard. But knowing the error message which generate the "500 page" would be far better !

Regards,