1Password on Linux fails to export passwords to 1PUX

Hi, 

1Password for Linux 8.12.5 (81205001) fails to export to 1PUX on Ubuntu 24.04.

After typing the master password, pressing 'Export Data' nothing happens (I was expecting the window to select where to save the file).
In fact I tried it on two Ubuntu 24.04 machines, and the same happens on both.

 Sergey