The Product Configuration Framework (PCF) has been sunset few years back, there are no maintenance release done on it. Over the last few years we have switched to the Product Configurator appropriate for each vertical (which is Product Designer in FS and Product Builder in Insurance).

If a custom implementation has been done using PCF then you will have to take the necessary steps to point that version of PCF application to the appropriate dependent application versions. 

In case you need further help please reach out to your Pega Account Executive who can find the details and provide you with appropriate support .