Error using unialigner

[kokyriakidis]

I get this error when I try to use this tool. Any clue what is happening?

=== Stack Trace ===
/unialigner/tandem_aligner/build/bin/tandem_aligner(+0xdff9) [0x55f21bd66ff9]
/unialigner/tandem_aligner/build/bin/tandem_aligner(+0x1eb0b) [0x55f21bd77b0b]
/unialigner/tandem_aligner/build/bin/tandem_aligner(+0xa5a9) [0x55f21bd635a9]
/lib/x86_64-linux-gnu/libc.so.6(+0x29d90) [0x7ff30e559d90]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80) [0x7ff30e559e40]
/unialigner/tandem_aligner/build/bin/tandem_aligner(+0xaad5) [0x55f21bd63ad5]
tandem_aligner: /unialigner/tandem_aligner/src/projects/tandem_aligner/tandem_aligner.hpp:186: void tandem_aligner::TandemAligner::Find(const std::experimental::filesystem::v1::__cxx11::path&, const std::experimental::filesystem::v1::__cxx11::path&) const: Assertion `first_vec.size()==1' failed.
/var/lib/slurm/slurmd/job1336413/slurm_script: line 16: 879706 Aborted                 (core dumped) /unialigner/tandem_aligner/build/bin/tandem_aligner --first "/output/2_GFATOOLS_RESULTS/1_3_23_R1041_DORADO_v0.4.1_400bps_SUP_v4.1.0_SIMPLEX_DUPLEX_UL_HG002_3_MIN5000/1_3_23_R1041_DORADO_v0.4.1_400bps_SUP_v4.1.0_SIMPLEX_DUPLEX_UL_HG002_3_MIN5000.asm.bp.hap1.fasta.gz" --second "GRCh38_GIABv3_no_alt_analysis_set_maskedGRC_decoys_MAP2K3_KMT2C_KCNJ18.fasta" -o "/kkyriaki/unialigner"