m0useanswered grow question 6 months ago I find mobile side of this site is garbage. more so then desktop version. They are both shit. but mobile is even shittier.
Try desktop and see if it does the same thing.
Most contests that have error joining them say something in the comments on it. Like the super sativa seeds contest. no one can join it from error that GD seems unable to fix or unwillining. They got their payment for it so why do anything else lol.