I presume you are asking as LR is unable to 'see' the RAW photos on your camera?
What is the model of the camera, and what error message do you get? There is a paid upgrade to LR6 or subscription with PS and LR CC. LR 5.7.1 will not be updated by Adobe.
You may be able to use the DNG convertor to convert the raw format to DNG format which can probably be read by you existing copy.
Here is the current list of cameras that are supported by Lightroom, as well as the version of Lightroom required. Cameras are listed alphabetically by manufacturer, so Sony is near the bottom of the list. Check for your camera model, and the list will tell you the minimum version of Lightroom that is required: Cameras supported by Adobe Camera Raw