error with "python3 download_proteins.py --org KEGG.org --out NCBI-proteins --concurrent 2" has no url,skip

[Drxu007]

when I run the code about "python3 download_proteins.py --org KEGG.org --out NCBI-proteins --concurrent 2" , there is a error.
...
[INFO] record ['<a href='/kegg-bin/show_organism?org=ztr' id="ztr">ztr', 'KGB'] has no url, skip[INFO] record ['<a href='/kegg-bin/show_organism?org=zvi' id="zvi">zvi', 'KGB'] has no url, skip
[INFO] 0 records pass, downloading...
[INFO] 0 success, 0 failed.
The first step is success. This confused me.