That's schreenshot:

When installing syncdrive.
I hope you can help me!
That's schreenshot:

When installing syncdrive.
I hope you can help me!
Gambas v3.5 is not available in the official Ubuntu software sources.
According to the Gambas web page it is available from the PPA ppa:nemh/gambas3
See What are PPAs and how do I use them? if you don't know what a PPA is.