magento2 – Magento DHL – Error parsing XML request: invalid byte

Try to connect DHL with the default DHL module in Magento 2.2.6 but get an error for any quote request:

    
        Fault
        
            111
            Error parsing XML request: invalid byte
2 of the 2-byte UTF-8 sequence.
        
    

Copied in the dhl test environment – everything works fine … What can be a reason?


    [2018-12-07 08:52:17]    Hand.DEBUG: painting (
& # 39; request & # 39; => & # 39;
********UK117216москваUK2018-12-07PT24H00MCMKG10,500380863334YUK156005КостромаSCRUB2500.00



& # 39 ;,
& # 39; from_cache & # 39; => true,
& # 39; response & # 39; => & # 39;

    
        
            2018-12-07T09: 52: 17.064 + 01: 00
            ****
            ****
        
        
            Fault
            
                111
                Error parsing XML request: invalid byte
2 of the 2-byte UTF-8 sequence.
            
        
    




& # 39 ;,
) [] []