File is over maximum upload size
The uploader flags a specific file as too large before (or instead of) sending it. Product text looks like: "{filename}" is over your maximum upload size ({maxSize}). Remove it or shrink the file.
Why this happens
Client precheck compares file.size to maxUploadBytes from the upload page (tier Max upload size, site fallback, and Upload hard cap). Same ceiling family as File exceeds maximum upload size, but this wording is the per-file queue warning with the filename filled in.
Diagnose and fix
1. Member: remove that file from the queue, compress/split it, or pick a smaller file.
2. Admin → Settings → Users & limits → Max upload size (ul2_max_up_mb_*) — raise for that tier if allowed (0 = unlimited up to the hard cap).
3. Mods → Upload hard cap (upload_hard_cap_gb) if the tier looks high enough but still blocks.
4. Per-user override on that account when only one member needs a different cap.
5. Or point them at a higher plan when upgrade feedback offers it.