Possible reason:
1. Driver issue
Driver is not well installed
2. TF connection issue
Kess V2/Ktag fails to read out TF card program or the program in the TF card not working properly
Solution:
1. Make sure driver is well/completely installed.
Follow the video to install K-suite V2.13
https://www.youtube.com/watch?v=JC5GY9jjQBU2. If driver is set properly. Dissemble the kess v2 or Ktag device to check the TF card. Replace the TF card.
Clean up the shrapnel on the card slot with a brush
If the card slot shrapnel is not flexible enough, lift up the shrapnel a little bit to make sure it can communicate well with the TF card
Clean the TF card and then put it back to card slot.