Maybe a connection problem, not unusual with NCBI. There is no need to bother with the NCBI Toolkits, you can get fastq files directly with links from e.g. sra-explorer.info
If you visit that website (which is a wrapper around the NCBI and ENI APIs) and enter your accession it will return several download links, e.g. these to get fastq directly:
ftp.sra.ebi.ac.uk/vol1/fastq/SRR704/004/SRR7046484/SRR7046484_1.fastq.gz
ftp.sra.ebi.ac.uk/vol1/fastq/SRR704/004/SRR7046484/SRR7046484_2.fastq.gz
so simply do a `wget` or `curl` to get them:
wget ftp.sra.ebi.ac.uk/vol1/fastq/SRR704/004/SRR7046484/SRR7046484_1.fastq.gz
wget ftp.sra.ebi.ac.uk/vol1/fastq/SRR704/004/SRR7046484/SRR7046484_2.fastq.gz
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