Error: Using $this when not in object context when save customer data

-- url of the page with the problem -- : www.ginmacher.de/index.php/warenkorb
-- HikaShop version -- : 3.2.2
-- Joomla version -- : 3.7.2
-- PHP version -- : 7.1
-- Browser(s) name and version -- : Firefox, Chromecast
-- Error-message(debug-mod must be tuned on) -- : Using $this when not in object context

Hello Community,

I am facing another issue. When I access the customer are via module link for the hika shop, I can access and change my data (see screenshot number 1)

When I click the save button afterwards, I always get the same error messager (see screnshot 2) ==> Using $this when not in object context



I treid to analysze the error, but Google tells me that it could be due to 3rd party components are not up2date or not comtabile with this version of Joomla, but verything looks fine.

Also I tried the debug mode for background and language, but I do not get where I could see what I need to do here.

Thank you for your support!

Hello all,

it was the PHP Version 7.1 With 7.0 it's working.

Does anyone know how to determine which component brings up the error. It could be any component from 3rd party, correct?

Is there a way to see this somehow or is it try and error??

Thanks

Thank you Jerome. I will go deeper in it and will come back asap.