vim-gtk vs. vim-gtk3

[erore]

In Jessie, I have gvim installed as vim-gtk and everything worked nicely. After upgrade to Stretch, launching gvim from Konsole gives a lot of errors (although it runs but the KOnsole is filled with reports from gvim). So I am wondering in Stretch (with KDE), is it correct to use vim-gtk or should I use vim-gtk3 to avoid receiving the errors?

The errors: When gvim is launched, I get twice:

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(gvim:14137): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",

Then if I click anywhere in gvim, the Konsole is filled with

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** (gvim:14137): WARNING **: invalid source position for vertical gradient

These things did not use to happen on Jessie, I just launched gvim and then could further use the same Konsole instance without it being flooded by Warnings from gvim.

Thank you.

[mogplus8]

I have the same issue but with xoscope V2.0. It looks like it is working fine, and actually it is, but every time I click a menu item (other than Help, that seems to be okay) I get hundreds of error messages, all the same "** (xoscope:9701): WARNING **: invalid souirce position for vertical gradient" displayed in the console.
I'm using KDE Neon.

[None1975]

After upgrade to Stretch, launching gvim from Konsole gives a lot of errors (although it runs but the KOnsole is filled with reports from gvim).

Do you have a gtk theme "Adwaita" installed?