Is it possible to use odd number of sites with the MPS code? I am getting the following error when I change the number of sites from 8 to 7 using the tutorial file (with almost no change but changing the lattice and lattice libraries, lattice and python files are attached in case you want to reproduce):

Running task 1.
This binary contains symmetries: nu1
MAQUIS repo r4143
Temporary storage is disabled
site_types: 0 0 0 0 0 0 0
phys[0]: |( <1,0,0,0,0,0>: 1 )( <-1,0,0,0,0,0>: 1 )|
Right end: <0,0,0,0,0,0>
MPS initialization has finished...
Expecting 0 states to orthogonalize to.
Boundaries are partially initialized...
Boundaries are fully initialized...
Done init_left_right
TSMPOTensor: 1x5,  5 operators, 8 tags
TSMPOTensor: 5x5,  8 operators, 11 tags
TSMPOTensor: 5x5,  9 operators, 11 tags
TSMPOTensor: 5x5,  9 operators, 11 tags
TSMPOTensor: 5x5,  9 operators, 11 tags
TSMPOTensor: 5x1,  5 operators, 8 tags
Total number of tags: 60

Sweep 0, optimizing sites 0 and 1
Exception thrown:
vector::_M_fill_insert
The group '/spectrum' does not exist.