Okay so here is my problem

I have multiple fastq file paired end, and I would like to perform an alignemnt with Hisat2 using job array, But there is an error that make it doesn't work It tells me that there is an error with this line "SHORTNAME1=$(basename "${R1_file[$SLURM_ARRAY_TASK_ID]}".fastq.gz )" variable without link

    #!/bin/bash
##SBATCH --time=1:00:00
#SBATCH --nodes=1
#SBATCH --ntasks=1
#SBATCH --mem=32G
#SBATCH --cpus-per-task=16   
#SBATCH -o log/slurmjob-%j
#SBATCH --job-name=hist2
#SBATCH --partition=short
#SBATCH --array=0-7 

SCRATCHDIR=/storage/scratch/"$USER"/"$SLURM_JOB_ID"
DATABANK="$HOME/index/

OUTPUT="$HOME"/rnaseq/hisat2
mkdir -p "$OUTPUT"
mkdir -p "$SCRATCHDIR"
cd "$SCRATCHDIR"

R1_file=($(find "$HOME"/rnaseq/ -type f -name "*R1_trim.fastq.gz"))
R2_file=($(find "$HOME"/rnaseq/ -type f -name "*R2_trim.fastq.gz"))


SHORTNAME1=$(basename "${R1_file[$SLURM_ARRAY_TASK_ID]}".fastq.gz ) 
SHORTNAME2=$(basename "${R2_file[$SLURM_ARRAY_TASK_ID]}".fastq.gz)
hisat2 -p $SLURM_CPUS_PER_TASK -x "$DATABANK"   -1 "$R1_file[$SLURM_ARRAY_TASK_ID]}" -2 "${R2_fiile[$SLURM_ARRAY_TASK_ID]}" -S "$SCRATCHDIR"/"$SHORTNAME1".sam "$SCRATCHDIR"/"$SHORTNAME2".sam | \
    samtools view -b -S - | samtools sort - -o  "$SCRATCHDIR"/"$SHORTNAME1".mapped.sorted.bam "$SCRATCHDIR"/"$SHORTNAME2".mapped.sorted.bam

Can somebody help ?