I understand where the problem lies:
I have always used the Wacom tablet, I do a lot of graphics and photo editing and I am so used to it that I use it for everything, I have always closed the mouse in my drawer, I never use it.
I do not do it long, took, inserted and 'miracle' Scribus is back to work normally.
The strange thing is that with the other versions of Scribus I have never had any kind of problem, evidently the latest versions do not adequately support the tablet.
Well, I'm glad I solved it, I was already looking around to see how to replace Scribus, which is anything but simple, it means that when I need it I will use the mouse.
Thanks to those who have read and answered me, I also put SOLVED in the title for others who may have the same problem as me.
Thanks a lot to everyone...
Alfred