In Protools, have you assigned a MIDI channel to the MIDI Track? If you haven’t it won’t work as your Kemper can’t receive MIDI if it is not on the correct channel.
You have exported the MIDI correctly so there must be an issue with your MIDI in ProTools.
Please add markers to your ProTools session. Add a marked called ‘START’ at the start of the songs and a marker called ‘END’ at the end of the song.
ProTools can get confused when exporting MIDI if you don’t have these markers in place. Your MIDI clips should also always be the same length as your backing track audio.
Please let me know if this helped.