Fix: Telegram API Application Submission Errors (Invalid App Title or Short Name)

When creating an application on the Telegram API Development Tools page, some users encounter an error that interrupts the process. This happens when the backend rejects your application during validation, preventing the registration of your API ID and API HASH.

In most cases, this occurs because the App title or Short name you entered does not comply with Telegram’s input rules. However, VPN usage, ad blockers, browser conflicts, or account issues (like unverified or restricted accounts) can also cause this error.

The good news is that these problems are easy to fix. This guide will walk you through the most effective solutions to successfully register your application.

Before You Begin

Before applying the fixes, make sure to check these important points:

• App Title: Must not exceed 64 characters. Avoid using reserved words like telegram or adding @, #, or other symbols.
• Short Name: Only lowercase letters and numbers are allowed, with a length between 5–32 characters. No spaces or hyphens.
• Account Status: Ensure your Telegram account is verified and not restricted or banned.
• Browser: Use an updated browser (preferably Chrome or Firefox). If possible, try using Incognito/Private mode to avoid extension conflicts.
• Cache: Clear your browser cache and cookies before attempting again.

1. Ensure You Enter a Valid App Title and Short Name

An incorrect App title or Short name can trigger a syntax validation error, causing Telegram’s backend to reject the registration request.

The App title must not include reserved words like telegram, nor should it contain spaces or special symbols such as @ or #. Keep it under 64 characters.

For the Short name, only lowercase alphabets and numbers are allowed. It must be between 5–32 characters long. Avoid using special characters like hyphens or underscores.

By following these input rules, you can prevent your registration request from being rejected.

2. Disable VPN and Ad Blockers

VPNs change your network IP address, which may trigger Telegram’s security protocols. If your IP address does not match your account’s registered region, Telegram can block the request.

Additionally, Ad blockers can block critical web scripts and authentication tokens, leading to submission failures.

Here’s how to disable them:

• For Proton VPN and Chrome

1. Click on the System tray button on the taskbar and double-click the VPN icon.
2. Click on the Disconnect button to terminate the VPN connection.
3. Open your browser and click the vertical ellipsis (three dots) in the top-right corner.
4. Hover over the Extensions option, then select Manage Extensions.
5. Click the toggle button to disable the AdBlock extension.
6. Return to the API Development tool page and try registering your application again.