Fix Failed Tubeup Uploads and Common Errors

Most Tubeup failures come down to one of four things: the upload engine you are running, the Gemini API key, a limit YouTube is applying to your channel, or a network layer blocking one of the three connections the app makes. Work through the symptom that matches what you are seeing rather than changing settings at random.

Start by narrowing it down

Tubeup opens exactly three external connections: YouTube for uploading, Google Gemini for metadata, and a license server for one-time activation. Everything else is local. That short list is useful, because it means almost every failure can be traced to one of those three, and each one fails in a recognisable way.

Before anything else, note which stage broke. Metadata generation failing tells you about Gemini. Uploads failing tells you about YouTube or your upload engine. Activation failing tells you about the license server. Fixing the wrong one wastes time.

Uploads fail partway through a batch

The most common cause is the upload engine you are on. In official YouTube API mode, your uploads consume an API quota that YouTube allocates and refills on its own cycle. When you exhaust it, further uploads are refused and the error YouTube returns will refer to quota. The batch stops mid-run, and everything already uploaded is fine.

The fix is either to wait for the quota to refill or to switch to unlimited mode, which is not bound by the API quota at all. If you regularly move large batches, unlimited mode is the mode to be in.

If you are already in unlimited mode, look at the connection instead. Long sequential runs are sensitive to interruptions — a sleeping machine, a dropped Wi-Fi connection, or a VPN reconnecting mid-transfer will all break an in-flight upload. Disable sleep for the duration of a large batch and prefer a wired connection when you have one.

The third possibility is the individual file. If the run consistently fails on the same video while others succeed, the problem is that video, not the batch: check its length and its file against what your channel is allowed to upload.

A channel is capped no matter what you change

YouTube applies its own limits to new and unverified channels, independent of any tool. An unverified channel has a ceiling on how many videos it can publish in a day and on how long a single video can be. No upload engine and no setting in Tubeup changes this, because the limit is enforced on YouTube's side.

If a fresh channel refuses uploads that a mature channel accepts, verify the channel with YouTube first. Then retry the batch. Planning a large first batch on a brand-new channel is the single most common way people run into a wall that looks like a Tubeup bug and is not.

Metadata generation returns nothing

When the AI step produces empty results or does not complete, the Gemini API key is almost always the cause. Keys come from Google AI Studio and there is a free tier, so the usual failures are an invalid key, a key that has been revoked or regenerated elsewhere, or a key that is being rate-limited because the free tier's allowance for the period is used up.

Check the key first: confirm it is the current one in Google AI Studio, and paste it into Tubeup fresh rather than assuming the stored value is still good. If the key is valid, the next suspect is rate limiting — waiting and retrying with a smaller batch will tell you quickly, since a rate-limited key fails immediately and consistently while a working key does not.

If the key is fine and small batches also fail, the connection to Gemini is being blocked. See the network section below.

Thumbnails aren't attaching

Tubeup detects thumbnails by filename: an image sitting alongside a video with a matching name is attached automatically. When thumbnails silently do not appear, the mismatch is nearly always in the filename or the location.

Check that the image is in the same folder Tubeup scanned, and that its base name matches the video's exactly — trailing spaces, a different suffix, or an added word are all enough to break the match. Also remember that Tubeup detects existing thumbnail files; it does not generate images, so a video with no matching image will simply upload without a custom thumbnail.

Separately, YouTube requires a verified channel before it accepts custom thumbnails at all. If the filenames are right and thumbnails still do not appear on YouTube, verify the channel.

Videos upload but appear private

This is usually scheduling working as designed. A video with a future publish date is held privately by YouTube until that moment arrives, so a freshly uploaded scheduled batch should look private. Check the publish dates before assuming something failed.

If the videos have no scheduled date and are still private, the batch was uploaded with a private visibility setting — either the global default or a per-video override. Fix the visibility on the affected videos rather than re-uploading; the files are already on YouTube.

A channel won't connect

Channel authorization failing at the sign-in step usually means the authorization flow was interrupted or the account you signed in with does not have upload permission on the channel you are targeting. Retry the authorization and confirm you are picking the right channel for the account.

If the flow does not complete at all, treat it as a network problem.

Activation or license problems

Activation contacts the license server once. If activation fails while the rest of your internet works, that specific connection is being blocked, or the license is already activated elsewhere. Confirm the key against your purchase receipt before assuming a network cause — Tubeup is a one-time $19 purchase with no subscription, so an activation failure is not a lapsed billing issue.

Firewalls, VPNs, and antivirus

Because Tubeup only talks to three places, blocking any one of them produces a very specific failure rather than a general breakage. Everything works but metadata is empty: Gemini is blocked. Everything works but uploads fail immediately: YouTube is blocked. Everything works but the app will not activate: the license server is blocked.

Corporate firewalls, VPNs, and aggressive antivirus suites are the usual culprits. Test by temporarily disabling the VPN, or by running the app on a normal home connection, and see whether the specific stage recovers. If it does, add an exception rather than leaving protection off.

Next steps

• Set up a Gemini API key correctly
• Review how a bulk upload run works
• Still stuck? Reach the team through Degird support.