Fix tag loader broken when using a non-supported source (fix #1047)
Fix tag loader broken when using a non-supported source (fix #1047)

Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber