HTC Desire 530 & Sideload

[julietgray]

I believe that I successfully unlocked the bootloader but I am trying to sideload .img and .zip . My HTC Desire 530 is saying that the sideload has failed. What should I do?

 

[julietgray]

I believe that I successfully unlocked the bootloader but I am trying to sideload .img and .zip . My HTC Desire 530 is saying that the sideload has failed. What should I do?