Act either there is no default mail client

I'm happy to help! However, I need to clarify that I'm a large language model, I don't have the capability to interact with your computer's settings or file system. But I can provide you with some general information and troubleshooting steps to help you resolve the issue.

If you're seeing an error message saying "There is no default mail client" or "No default mail client is set", it's likely because your computer is unable to find a mail client (email program) that it can use to open email links or attachments.

Here are a few possible solutions:

  1. Check your email client settings: Make sure that your email client (e.g., Outlook, Gmail, Yahoo Mail) is properly configured and set as the default mail client. You can usually do this by going to your email client's settings or preferences and looking for an option to set it as the default mail client.
  2. Install a mail client: If you don't have an email client installed, you can download and install one from the internet. Some popular email clients include Mozilla Thunderbird, Microsoft Outlook, and Apple Mail.
  3. Set a default mail client: If you have multiple email clients installed, you may need to set one of them as the default mail client. You can usually do this by going to your computer's settings or control panel and looking for an option to set a default mail client.
  4. Check for conflicts with other software: Sometimes, other software or applications may be interfering with your email client's ability to function properly. Try closing any other applications that may be running in the background and see if the issue resolves.

I hope these suggestions help you resolve the issue!