(qiime2-2022.2) qiime2@qiime2core2021-2:~/Documents/FH-Exp001$ qiime ancombc ancombc --i-table od9_ancom/table-Klaeranlage-L7.qza --m-metadata-file Bsc-Heck-metadata.tsv --p-formula "Zusatzinfo" --o-differentials od9_ancom/diff-Klaer-L7.qza --verbose 
Running external command line application(s). This may print messages to stdout and/or stderr.
The command(s) being run are below. These commands cannot be manually re-run as they will depend on temporary files that no longer exist.

Command: run_ancombc.R ./input.biom.tsv ./input.map.txt Zusatzinfo holm 0.9 1000 Zusatzinfo TRUE TRUE 1e-05 100 TRUE 0.05 FALSE ./output.summary.txt

R version 4.1.2 (2021-11-01) 
?? Attaching packages ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? tidyverse 1.3.1 ??
? ggplot2 3.3.5     ? purrr   0.3.4
? tibble  3.1.6     ? dplyr   1.0.8
? tidyr   1.2.0     ? stringr 1.4.0
? readr   2.1.2     ? forcats 0.5.1
?? Conflicts ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? tidyverse_conflicts() ??
? dplyr::filter() masks stats::filter()
? dplyr::lag()    masks stats::lag()
Traceback (most recent call last):
  File "/home/qiime2/miniconda/envs/qiime2-2022.2/lib/python3.8/site-packages/q2cli/commands.py", line 339, in __call__
    results = action(**arguments)
  File "<decorator-gen-456>", line 2, in ancombc
  File "/home/qiime2/miniconda/envs/qiime2-2022.2/lib/python3.8/site-packages/qiime2/sdk/action.py", line 245, in bound_callable
    outputs = self._callable_executor_(scope, callable_args,
  File "/home/qiime2/miniconda/envs/qiime2-2022.2/lib/python3.8/site-packages/qiime2/sdk/action.py", line 418, in _callable_executor_
    artifact = qiime2.sdk.Artifact._from_view(
  File "/home/qiime2/miniconda/envs/qiime2-2022.2/lib/python3.8/site-packages/qiime2/sdk/result.py", line 305, in _from_view
    result = transformation(view, validate_level)
  File "/home/qiime2/miniconda/envs/qiime2-2022.2/lib/python3.8/site-packages/qiime2/core/transform.py", line 70, in transformation
    new_view = transformer(view)
  File "/home/qiime2/miniconda/envs/qiime2-2022.2/lib/python3.8/site-packages/qiime2/core/transform.py", line 221, in wrapped
    file_view = transformer(view)
  File "/home/qiime2/miniconda/envs/qiime2-2022.2/lib/python3.8/site-packages/q2_types/feature_data/_transformer.py", line 645, in _224
    qiime2.Metadata(data).save(str(ff))
  File "/home/qiime2/miniconda/envs/qiime2-2022.2/lib/python3.8/site-packages/qiime2/metadata/metadata.py", line 405, in __init__
    super().__init__(dataframe.index)
  File "/home/qiime2/miniconda/envs/qiime2-2022.2/lib/python3.8/site-packages/qiime2/metadata/metadata.py", line 96, in __init__
    self._assert_valid_id_header(id_header)
  File "/home/qiime2/miniconda/envs/qiime2-2022.2/lib/python3.8/site-packages/qiime2/metadata/metadata.py", line 134, in _assert_valid_id_header
    raise ValueError(
ValueError: pandas index name (`Index.name`) must be one of the following values, not None:

Case-insensitive: 'feature id', 'feature-id', 'featureid', 'id', 'sample id', 'sample-id', 'sampleid'

Case-sensitive: '#OTU ID', '#OTUID', '#Sample ID', '#SampleID', 'sample_name'

Plugin error from ancombc:

  pandas index name (`Index.name`) must be one of the following values, not None:

  Case-insensitive: 'feature id', 'feature-id', 'featureid', 'id', 'sample id', 'sample-id', 'sampleid'

  Case-sensitive: '#OTU ID', '#OTUID', '#Sample ID', '#SampleID', 'sample_name'

See above for debug info.