Cannot load NeRF data

[nikanfds]

I tried the example of https://github.com/Zielon/metrical-tracker, and could successfully run tracker, and then ./generate.sh. then when I run:
INSTA$ ./build/rta --config insta.json --scene "/home/ubuntu/INSTA/data/duda" --height 512 --width 512 --no-gui

it arrives at this error after few minutes of running:
.
.
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19:59:30 INFO Recording frame [99/100] in the mode vertical
19:59:30 INFO Recording frame [100/100] in the mode vertical
19:59:30 INFO =========== Cleaning the dataset ===========
Core::~Core
19:59:30 ERROR Uncaught exception: Cannot load NeRF data from an empty set of paths.