want to know weather my demultiplxed data is even true or not

i had run my sequences and i am getting demultiplxed curve data visualized from qiime view that gives me all single line rather than box plot at 1-301 position bases is it even correct or technical error i am pasting the code for references. qiime tools import \

--type 'SampleData[PairedEndSequencesWithQuality]' \

--input-path text.csv \

--output-path demux-paired-end.qza \

--input-format PairedEndFastqManifestPhred33V2

qiime demux summarize \

--i-data demux-paired-end.qza \

--o-visualization demux-paired-end.qzv