Hi @avtober,
It is hard to tell from this ...
... if you actually entered in the command in this way? Did you add the \ at the end of each line? This is required if you want to execute your command over several lines... otherwise this should all be on one line. Also, I'm not sure why SampleData[PairedEndSequencesWithQuality] is in the command. This is likely the culprit causing the command to fail. Check out this older cutadapt tutorial.
Just to sanity-check, can you make sure the following works:
module load qiime2/2020.11
qiime --help
-Mike