Topic
Errors
Why a product error or blocked message appears, and how to diagnose it.
Guides
Articles
Step-by-step write-ups for this topic.
- Download or upload must stay enabledThe product refuses a setup where both download and upload would be turned off for that tier or tool.View article
- Upload canceledThe browser aborted the upload (cancel button, closed tab, or navigation). Not a server rejection.View article
- Copy file exceeds maximum upload sizeThe public file you are copying is larger than your plan’s max upload size (ul2_max_up_mb).View article
- Copy files not allowed for your planBlock copy files is on for this tier (toggle.ul2_copy_block_*), so the Copy tab is refused.View article
- Copy finished but no file id returnedThe copy API returned success without a fileId, so the client cannot show the new file.View article
- Could not finalize uploadMultipart parts could not be merged into the final file on complete (disk/IO failure).View article
- Could not finalize upload on storage serverThe blob was written (or partly written) but cleanup/finalize on the assigned storage server failed.View article
- Could not load security tokenThe upload page could not fetch a CSRF token from /api/auth/csrf before uploading.View article
- Could not resolve host for remote uploadDNS lookup for the remote URL hostname failed before the server would fetch the file.View article
- Could not save upload partA chunked upload part failed to write on the server (disk, permissions, or stream error).View article
- Empty response bodyRemote URL import got an HTTP success but the browser received no response body stream.View article
- Enter one or more URLsRemote URL upload was started with an empty textarea — client-side validation only.View article
- Expected multipart form-dataAn upload API got a body that is not multipart/form-data (wrong Content-Type or client).View article
- Expected multipart with a file fieldMember API single-shot upload requires multipart/form-data including a real file field.View article
- File exceeds 512 MiB remote upload limitA large remote/app-buffered transfer hit a ~512 MiB ceiling; use CDN, direct upload, or local staging.View article
- File exceeds maximum upload sizeThe file is larger than the member’s effective max upload (tier cap and/or site hard cap).View article
- File uploads not available for your planUploads are off for this plan and there is no purchasable higher plan that unlocks them.View article
- File uploads not available — upgrade to startUploads are off on this plan, but a higher purchasable plan can unlock them via Upgrade.View article
- Import finished but no file id returnedRemote URL import looked successful but the client never received a fileId to open.View article
- Invalid progress data from serverRemote URL import returned a progress line the browser could not parse as NDJSON.View article