Unsolved Qt hello speak running error

[ssdroon30]

Hello,

I have installed Ubuntu 20.04 and Qt 5.14.2.
I want to run the Qt example hello_speak.
When I Build and Run it in QTCreator it runs perfectly, but when I want to run the executable file from my home directory so:
sudo ./hello_speak

than I get the following error what I see in the terminal:
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
Connection to speech-dispatcher failed

The window is running, but I can't choose any options under Language and in Voice name.
What could be the problem?

Thank you in advance for the answers!

[jsulm]

This post is deleted!

[SGaist]

Hi and welcome to devnet,

What are you trying to execute your application as root ?

[ssdroon30]

@SGaist
Hello,

it is a simple runnable file after build.
Interesting, but now it works.

I use without sudo:
./hello_speak

Thanks for the answer.