Mageck count error: Cannot automatically determine the --trim-5 length

Hi there,
i am trying to analyze paired end NGS CRISPR Screen Data using the Mageck Flute Pipeline.
After running fastqc and fastq groomer, I used cutadapt to trim adapter sequences.
When using Mageck count, I get this error: Cannot automatically determine the --trim-5 length. Only 0.0 % of the reads can be identified

Maybe there is something wrong with the adapter trimming already? I also tried trim galore but got the same error when performing Mageck count.

Thanks, I appreciate your help!

Cross-posted here Exit code 255 in Mageck Count