Blender fails, /run/user/1001/gvfs/ non-existent directory

Hello
I just installed OBS then Blender from Flathub using Debian 10 (Buster) terminal.
So far OBS seems to be working fine.

For Blender the installation process seemed Ok, although it came with the following warnings :

Warning: org.freedesktop.Platform.GL.default already installed

Warning: org.freedesktop.Platform.openh264 already installed

the whole message generated by the installation process is at the end on this post.
On the other end Flatpack run.blender.Blender generated the following lines, including error messages :

flatpak run org.blender.Blender
/run/user/1001/gvfs/ non-existent directory
/usr/include/c++/10.2.0/bits/stl_deque.h:1326: std::deque<_Tp, _Alloc>::reference std::deque<_Tp, _Alloc>::operator[](std::deque<_Tp, _Alloc>::size_type) [with _Tp = nv50_ir::ValueRef; _Alloc = std::allocator<nv50_ir::ValueRef>; std::deque<_Tp, _Alloc>::reference = nv50_ir::ValueRef&; std::deque<_Tp, _Alloc>::size_type = long unsigned int]: Assertion ‘__builtin_expect(__n < this->size(), true)’ failed.


The whole message generated in the terminal during installation :

flatpak install flathub org.blender.Blender
Looking for matches…
Required runtime for org.blender.Blender/x86_64/stable (runtime/org.freedesktop.Platform/x86_64/20.08) found in remote flathub
Do you want to install it? [Y/n]: Y

org.blender.Blender permissions:
ipc network pulseaudio x11 dri file access [1]

[1] host


    ID                                              Arch              Branch            Remote             Download
  1. [✓] org.freedesktop.Platform x86_64 20.08 flathub 253,8 MB / 267,9 MB
  2. [✗] org.freedesktop.Platform.GL.default x86_64 20.08 flathub 1.0 kB / 96,0 MB
  3. [✓] org.freedesktop.Platform.Locale x86_64 20.08 flathub 5,1 MB / 322,2 MB
  4. [✗] org.freedesktop.Platform.openh264 x86_64 2.0 flathub 1,2 MB / 1,5 MB
  5. [✓] org.blender.Blender x86_64 stable flathub 214,5 MB / 214,9 MB
  6. [✓] org.blender.Blender.Codecs x86_64 stable flathub 9,8 MB / 9,8 MB
  7. [✓] org.freedesktop.Platform.ffmpeg-full x86_64 20.08 flathub 4,1 MB / 4,1 MB
  8. [✓] org.blender.Blender.Locale x86_64 stable flathub 547,6 kB / 10,2 MB

Warning: org.freedesktop.Platform.GL.default already installed
Warning: org.freedesktop.Platform.openh264 already installed
Installation complete.


So far OBS ans Blender are the only Flatpaks on that computer.

Any idea ?
Thanks