TWRP reboot when installing ROM zip

[Lolli26]

Hi I'm new in this forum and I have a big problem, I have unlocked my device and installed TWRP but now when I try to flash a ROM the recovery restart the device and I get stuck to HTC boot screen with red text. I don't have wipe the OS in fact in download modeit shows the version. I need help because this device is my only daily driver...Please!!! thanks in advance