If you are trying to upload or download a single large file (a "solid piece"), keep these technical limits in mind:
: Uploads through a standard web browser are typically limited to 2 GB per file. Cansel — Yandex.Disk
If "Cansel" refers to canceling a paid plan (Yandex 360 Premium), you must do so through the account settings to avoid future charges: If you are trying to upload or download
: If your storage is full, Yandex Disk will limit you to viewing and downloading existing files only; you won't be able to upload new "pieces" until space is cleared or the plan is upgraded. Are you trying to cancel a specific upload in progress, or Yandex Disk – Cloud Storage - Apps on Google Play Cansel — Yandex.Disk
If you are seeing error messages when trying to access a specific link or file: