So I've been having this issue that when I do /seed, nothing pops up,
I'm pretty sure the issue is caused by updating old worlds to newer versions. (me being pretty sure isn't confirming that's how the bug happens, it's just my theory)
In most cases online the way most people go around the problem is while in the menu
for world selection/creation they select the world(with the broken /seed command), click on recreate world then click on more world options, and in that menu, they see the seed, for me that did work once but I tried it again after like half 6 months and it just says 0