i will try again.

all you are doing is adding 2 forward slashes (//) to line 94 of:

includes/modules/payment/dirbankuk.php

look at around line 91 for this section of code:

PHP Code:
// disable the module if the order only contains virtual products
      
if ($this->enabled == true) {
        if (
$order->content_type == 'virtual') {
          
$this->enabled false;
        }
      }
    } 
change the one line as i previously indicated so that same section now looks like:

PHP Code:
// disable the module if the order only contains virtual products
      
if ($this->enabled == true) {
        if (
$order->content_type == 'virtual') {
//          $this->enabled = false;
        
}
      }
    } 
if i am somehow unclear as to what i am suggesting to do, i would recommend someone else trying to explain it to you; or perhaps hiring someone to make the change.

if before you could checkout fine, and now you are getting a 500 error, that would suggest to me you have not correctly made the modification that i am recommending.

best.