no device found -

I get this error when click on record:

“Error opening sound device.
Try changing the audio host, recording device and the project sample rate”.

Audio devide info:

Default recording device number: -1
Default playback device number: -1
No devices found”

I have : Ubuntu 18.04.1 LTS
I installed audacity from “software de ubuntu”
Audacity 2.2.2

I tried the solutions from this thread: not recognizing any device
installing ppa repositories too, but nothing.

I can’t choose any device, no device recognized.

Can you help me pls? BTW, when I installed it, I think it recorded well, but not now.

Thanks very much

What audio device do you have?
What are you trying to record?