Hi @michiel,
I replaced the LogFormat:
#LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
#LogFormat "%h %l %u %t \"%r\" %>s %b" common
LogFormat "%h %l %u %t \"%{REQUEST_METHOD}e %{REQUEST_URI}e %{SERVER_PROTOCOL}e\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %{SERVER_PROTOCOL}e %>s %b" common
And I still got the http/1.1:

Regards,