Experimental raspios Linuxcnc Trixie images.

Perhaps I wasn't more specific, but the error message indicates that it can't find the imp module.Then I send a screenshot of the error.From what I've read now, it seems to be due to something related to the Python version.

First of all I recommended to use the Rpi Imager to setup username, locale, and the other things needed.
If you didn't do this you should have gone through the setup screens to configure things.
This would have given you a user name.
This image is NOT LIKE the former images, it is based on the infrastructure that build the raspios images. The idea was to make it easier to setup the image and not have a preconfigured username and password.

I understand, but I installed GParted and Synaptic, and both require a password to log in. I use both because I have an SSD, and Synaptic for other tasks. I set a password in raspi-config, but it doesn't work to log in to these applications.

You've done something terribly wrong,
1; Didn't use RPi Imager to setup the settings
2: Choose to ignore the setup dialogue on the first boot.
In both instances you should have been able to setup a user name & password, the password for your account is the one that you use for sudo.
Both gparted and synaptic work when setup following the advice above.

imp can be replaced with (this module was removed from the version of python3 on trixie)
sudo apt install python3-zombie-imp

To go any further I think you will need to ask whether ProbeBasic and pyqtvcp has Trixie support.