Systematic approach for "Account not found" — follow these in order before contacting support:\n\n**Step 1**: Verify the server URL. Check whether it should start with http:// or https://. Both may be valid but the wrong one gives an error. Also verify the port number is included (usually :8080 or :25461 or similar).\n\n**Step 2**: Verify there are no spaces. Copy credentials to a plain text editor (Notepad, not Word) and check for leading or trailing spaces. A single space makes the entire credential invalid.