OpenMPT outright refuses to open SFZ files

[YajuShinki]

I was trying to open up an SF2 file with multiple instruments, but it would only load the first instrument in the file. I read in the manual that OpenMPT supports SFZ instruments, so I converted the instruments in the SF2 file to SFZs, but when I tried to open an SFZ file, OpenMPT would say that it's an unrecognized file format. I have no idea what could be going on here.
Running OpenMPT 1.26.12 on Windows 10 64-bit

[Saga Musix]

SFZ support is only built into the current development builds. You need to get an OpenMPT 1.27 development build from https://builds.openmpt.org/builds/ in order to open SFZ files.