No its not. People that run into this error can try one of the following options:
a) log out and log back in
b) stop using download managers that were in fashion 1984
c) clear their browser
d) not create double accounts. (see forum rules).
e) use firefox or chrome as their default browsers for the best results
f) you are trying to download a file that has been removed due a breach of site rules
Most of the times step a) solves the problem :thumb: