Error message when performing lefse task

Hi, I tried to perform a task but I encountered an error message:

Traceback (most recent call last):
  File "/shed_tools/testtoolshed.g2.bx.psu.edu/repos/george-weingart/lefse/a6284ef17bf3/lefse/format_input.py", line 435, in <module>
    feats = numerical_values(feats,params['norm_v'])
  File "/shed_tools/testtoolshed.g2.bx.psu.edu/repos/george-weingart/lefse/a6284ef17bf3/lefse/format_input.py", line 174, in numerical_values
    feats[k] = [float(val) for val in v]
ValueError: could not convert string to float: "0"

Could you help me to figure it out?
Thanks in advance!

Dear xkcococo,
The error message is maybe not enough to provide you with some help. Have you tried this tool on an official Galaxy server? If so, then please make an error report, you find a bug icon in Galaxy for that purpose. I assume that your file is not in the right format, but I would need to check this. You could also share your history here, if you dont have sensitive data.

Cheers,
Florian