For everyone having trouble getting TWRP working on the second beta release, here is a rooted boot image with TWRP included. If you are not rooted, flash through fast boot. If you are rooted I suggest to just flash through a kernel manager. Change your lock screen to a PIN number or just remove it in general before flashing the boot image just in case, and then reboot to recovery just to be sure it worked. Do not use this if you are on the first release and not the hot fix.