Error message: Fatal error: exception Ppatteries.Sparse.Tokenizer_error(1, 0, _)

[Naomi Gilbert]

Hello, when I run pplacer using the stockholm alignment generated by hmmalign I get the following Error:

Fatal error: exception Ppatteries.Sparse.Tokenizer_error(1, 0, _)

I created my reference tree with PhML and my initial alignments (MUSCLE alignment)/trimming were done in MEGA.

Thank you for your help!