Troubleshooting and FAQ

Most "missing" features are plan gated. Locked menu items appear muted with a small rocket icon, and clicking one opens the upgrade dialog with the plans that include the feature.

To check which plan you are on, click your avatar at the top of the sidebar to open the account menu. Your plan name (Team Member, Project Coordinator, or Project Manager) is shown under your name; during a free trial it shows the plan the trial gives you. On Team Member and Project Coordinator, including during a free trial, Upgrade Account in the same menu opens the upgrade options. A free trial that has ended, or a payment problem, also changes what is available, and a banner in the app says so. See plans and pricing for what each tier includes and billing and subscriptions for payment issues.

In a plan with dependencies this is usually correct behavior, not a bug. When a task moves later or runs longer, the tasks that depend on it are pushed later to keep their links. Links never pull tasks earlier, so moving a task earlier leaves the tasks after it where they are. When a cascade runs, a toast reports how many tasks were rescheduled and includes an Undo button, and Ctrl+Z (Cmd+Z on Mac) also reverses the change.

Dates can also change when you open a project you can edit. Ganttastic checks the dates once per session, moves any task that sits on a non-working day, starts earlier than its links allow, or has a finish that does not match its start and duration, and shows a Dates corrected message with Undo.

The other common cause is a change to the Work Calendar in Project Settings, which recalculates tasks against the new working days and holidays. The change applies as soon as you save. A toast reports how many tasks moved, and for 15 seconds its Undo button restores the calendar and the dates together. Ctrl+Z (Cmd+Z on Mac) does not reverse a calendar change. If dates keep surprising you, review the dependency lines between the affected tasks; see how automatic scheduling works.

All AI features draw from one allowance of tokens per user per month. Plans, chat, refinement, and scenarios share the same pool, so heavy use of one leaves less for the others.

The meter at the bottom of the sidebar shows your monthly AI capacity used and when it resets. Allowances reset on your billing anniversary date, or on your account creation day for free accounts, not on the first of the calendar month. Ganttastic adds an estimate of each message’s cost before sending it, so a long message can be refused a little before the meter reads 100%. To raise the allowance, choose Upgrade Account in the account menu. For what the AI can do with those tokens, see AI assistant.

A second limit has nothing to do with your allowance. Ganttastic has one daily AI limit shared by every account. When it is reached, the assistant says it has reached today’s shared usage limit, and the AI Project Wizard stops too. It resets overnight, Brisbane time, and upgrading does not change it, so try again the next day. The full rules are in AI usage and limits, and other messages the assistant can show are explained in waits and errors.

What to check depends on whether the person already had a Ganttastic account when you shared the project.

They already have an account. Access is granted the moment you add them, and Ganttastic does not email them, so tell them yourself. The project is under Shared With Me in their sidebar. Open the Share dialog and check that they appear under People with access with the role you meant, and that the address is spelled exactly as it is on their account.

They have no account yet. Send invitation email creates a pending invitation and emails them a link. Until they accept, their row under People with access reads like "Invited, viewer, expires in 6 days". To get access they must:

1. Sign up or sign in with that exact address, either from the link in the email or by opening Ganttastic. With Google, they pick the Google account that has that address.
2. Verify the address. A Google account is already verified.
3. Do both within seven days of the invitation.

If the email never arrived, ask them to check their spam folder, then click Resend on their row. Resend emails a new link and starts a fresh seven days, and the old link stops working. If the address was wrong, click Revoke and invite the right one. An invitation that expires leaves the list, so type the address again to send a new one. If the project has no free collaborator place when they accept, the invitation stays pending until you make room.

Every message the invitation page can show, and what each one means, is in what the invited person sees. Roles and limits are covered in share and collaborate.

A view only link stops working when the owner turns it off, when it passes its expiry date, or when the project is deleted. In each case the page says "This link is no longer available". Ask the project owner to check the link’s status in the Share dialog, or to create a new link. A link that was not copied in full shows a page not found error.

Two limits clear by themselves. After too many password attempts (5 in 15 minutes from one network, or 30 in an hour on one link), the page says "Too many attempts. Wait a few minutes before trying again." Loading shared plans more than 60 times in a minute from one network shows "Too many requests" for about a minute.

If the link opens but the plan looks out of date, reload the page. A public link shows the plan as it was when the page loaded, and the line under the project name says when that was, for example "Shown as of 21 Oct 2026, 14:05. Reload for the latest." The details are in what people see when they open a public link.

While signed in, Ganttastic is view only when your connection drops. Data that is already loaded stays visible, but edits are blocked: trying to add a task or send an AI message shows a "You’re offline" toast. Nothing is queued while you are offline, so make the change again once you reconnect; a message you typed for the AI assistant stays in its box. When the connection returns, a "Back online" toast confirms it and editing resumes. Loading the app and signing in both require a connection. The messages Ganttastic shows when a change cannot be saved are listed in loading states and offline behavior.

1. Hard refresh the page: Ctrl+Shift+R, or Cmd+Shift+R on Mac.
2. If an update shipped while the app was open, the app reloads itself once to pick up the new version. Let it finish.
3. Check your connection, then try another browser.
4. Still stuck? Email support@ganttastic.com with your browser and operating system.

A .gwise backup brings back the working days and holidays it was saved with, so they may not match yours. A Microsoft Project or spreadsheet import does not bring its calendar at all: the new project starts on a Monday to Friday week with no holidays. Either way, open Project Settings, go to the Work Calendar tab, and correct the schedule; dates recalculate against the new calendar as soon as you save, with a toast and an Undo.

For spreadsheet imports (Excel or CSV), wrong columns usually mean the mapping step needs another pass. Run the import again and check each mapped field; see import a project.

When tasks have disappeared from your Gantt chart they are almost always still there. Far more often they are hidden, collapsed, or in a project you are not currently looking at. Work through these in order:

• A filter is hiding them. The funnel icon in the Gantt header, or the Filter button in the List view, opens Filter Tasks, which shows and hides task rows. While a filter is on, the Gantt icon changes color and its tooltip reads "Filter tasks (filter active)", and the List view says how many rows it shows, for example "Filter on, showing 3 of 12". Choose Select All in that menu to bring everything back. This is the most common cause, because the filter stays on while you work in the project. It also clears when you switch to another project or reload the page.
• A parent task is collapsed. Sub-tasks tuck away under their summary row. Click the chevron next to a parent task to expand it again. See working with tasks.
• You are in a different view. My Tasks lists the tasks from all your active projects, including projects shared with you, not only tasks assigned to you. It leaves out sub-tasks and completed projects. Switch back to the Gantt or List view for the whole plan; see the My Tasks view.
• You are in a different project. Check the project name in the sidebar. Completed projects move into their own section and are easy to lose track of.
• They were deleted. Press Ctrl+Z (Cmd+Z on Mac) to undo, up to 30 steps per project.

Email support@ganttastic.com. Include what you tried, what happened instead, your browser and operating system, the email on your account, and the project name if it is relevant. Screenshots help.

Inside the app, the Feedback link at the bottom of the sidebar opens the Send feedback dialog. Choose Report a bug or Request a feature, add a title and details, and send it; it goes straight to the team, and the confirmation says the team may follow up by email. The Tour link in the same row replays the quick tour of the interface.

The dialog also attaches some context so the team can look into the problem, and a line under the form says so. Click that line to see exactly what is sent: your email address when you are signed in, your plan, the open project and view, the page, the app version, and your browser. A bug report also attaches your recent activity in the app; a feature request does not.

The Cookies link in the same row reopens the cookie banner so you can change your choice. Strictly necessary cookies, which keep you signed in, and Google reCAPTCHA, which protects sign up, are always on. Analytics and error monitoring run only after you choose Accept all; Reject non-essential keeps them off.