@slime_sleeper as a first time uploader the chapter needs to be checked by the mods to make sure it is not spam or something. It's best to just wait until they have done so.
@slime_sleeper Thanks for picking it up! I found the time to pick up the other one in which I was interested, but with this it was simply not possible. Oh yeah, i had to wait too, the mods need to check it, i didn't do anything and the chapter uploaded normally after a few minutes (probably they're sleeping now, and because of that there is a considerable delay).
@slime_sleeper was it your own scanlation or someone else's?
If it was yours/your group; then it was false alarm.
If it was other's; either you put incorrect group info which caused it to be flagged as plagiarism or the group themselves don't wish to have their work to be uploaded here.