qiime2 artifact not found in dada2 denoising step (but present)

Hi Colin, thanks for your response.
As I meanwhile managed to magically start running it but ran into more errors, I have another post going (error while running DADA2 in R (return code 1), all reads filtered. - #2 by Mehrbod_Estaki) so I think this thread can be closed? Thanks for your thoughts though! The problem seems to be something with the setup rather than my qza because when I run the tutorial data I get the same error message now than with my data:
PermissionError: [Errno 13] Permission denied: '/etc/sysconfig/clock'

Plugin error from dada2:

** [Errno 13] Permission denied: '/etc/sysconfig/clock'**

(qiime2-2019.4) n9606661@lyra04:~/qiime2-moving-pictures-tutorial> qiime dada2 denoise-single --i-demultiplexed-seqs demux.qza --p-trim-left 0 --p-trunc-len 120 --o-representative-sequences rep-seqs-dada2.qza --o-table table-dada2.qza --o-denoising-stats stats-dada2.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_dada_single.R /tmp/qiime2-archive-prx2uzes/99cf0944-0254-4510-95ae-029351285aa7/data /tmp/tmpevkficge/output.tsv.biom /tmp/tmpevkficge/track.tsv /tmp/tmpevkficge 120 0 2.0 2 Inf consensus 1.0 1 1000000 NULL 16

R version 3.5.1 (2018-07-02)
Loading required package: Rcpp
DADA2: 1.10.0 / Rcpp: 1.0.1 / RcppParallel: 4.4.2

  1. Filtering ..................................
  2. Learning Error Rates
    19539480 total bases in 162829 reads from 34 samples will be used for learning the error rates.
  3. Denoise samples ..................................
  4. Remove chimeras (method = consensus)
  5. Report read numbers through the pipeline
  6. Write output
    Traceback (most recent call last):
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/q2cli/commands.py", line 311, in call
    results = action(**arguments)
    File "</home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/decorator.py:decorator-gen-449>", line 2, in denoise_single
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/qiime2/sdk/action.py", line 231, in bound_callable
    output_types, provenance)
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/qiime2/sdk/action.py", line 393, in callable_executor
    spec.qiime_type, output_view, spec.view_type, prov)
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/qiime2/sdk/result.py", line 271, in _from_view
    provenance_capture=provenance_capture)
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/qiime2/core/archive/archiver.py", line 316, in from_data
    Format.write(rec, type, format, data_initializer, provenance_capture)
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/qiime2/core/archive/format/v5.py", line 21, in write
    provenance_capture)
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/qiime2/core/archive/format/v1.py", line 26, in write
    prov_dir, [root / cls.METADATA_FILE, archive_record.version_fp])
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/qiime2/core/archive/provenance.py", line 312, in finalize
    self.write_action_yaml()
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/qiime2/core/archive/provenance.py", line 289, in write_action_yaml
    fh.write(yaml.dump({'execution': self.make_execution_section()},
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/qiime2/core/archive/provenance.py", line 255, in make_execution_section
    runtime['start'] = start = self._ts_to_date(self.start)
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/qiime2/core/archive/provenance.py", line 249, in _ts_to_date
    return datetime.fromtimestamp(ts, tzlocal.get_localzone())
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/tzlocal/unix.py", line 131, in get_localzone
    _cache_tz = _get_localzone()
    File "/home/n9606661/miniconda3/envs/qiime2-2019.4/lib/python3.6/site-packages/tzlocal/unix.py", line 85, in _get_localzone
    with open(tzpath, 'rt') as tzfile:
    PermissionError: [Errno 13] Permission denied: '/etc/sysconfig/clock'

Plugin error from dada2:

** [Errno 13] Permission denied: '/etc/sysconfig/clock'**