Not saving New Diagrams

[Hygens]

I have problems on manjaro linux because after create one diagram and attempt save not saving nothing.
Steps to reproduce the behavior:

1. Go to Create New Diagram -> Cloud -> AWS
2. Click on Save or Save as...nothing saved on Manjaro Linux:
   

Expected behavior
Save diagram via Save or Save as...

draw.io version (In the Help->About menu of the draw.io editor):

• draw.io desktop version 15.2.7

Desktop (please complete the following information):

• OS: Manjaro Linux

[nitomartinez]

Happening also with:

draw.io version (In the Help->About menu of the draw.io editor):

• draw.io desktop version 15.2.7

**Desktop (please complete the following information): **

• OS: Ubuntu 20.4 with Mate Desktop

Error on the command line:

[10635:0926/091826.581458:ERROR:browser_main_loop.cc(269)] Gtk: gtk_native_dialog_run: assertion '!priv->visible' failed

Probably duplicate of #706

[kantorv]

Same here (ubuntu 20.04). Anyway found that it's possible to select and copy desktop drawings and paste to online app..
[1617722:0928/030041.375871:ERROR:browser_main_loop.cc(269)] Gtk: gtk_native_dialog_run: assertion '!priv->visible' failed

[davidjgraph]

I'm going to assume this is the same underlying issue as #706