OpenBuilds Control crashes on start

Running Appimage of Control 1.0.321 on Fedora 35

I get two warnings:

(node:2232391) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.

(openbuildscontrol:2232391): Gtk-WARNING **: 13:47:58.027: Theme parsing error: gtk.css:1:41: Expected a valid selector
statusCode: 200

Then I get error:

[2232391:0516/134758.684795:FATAL:gpu_data_manager_impl_private.cc(439)] GPU process isn't usable. Goodbye.
Trace/breakpoint trap (core dumped)

Ideas?

 

nvidia, nouveau drivers for GeForce GTX 1050 Ti
Certainly not cutting-edge, but also super-common.