This the messages I have from vivaldi. I just cut some messages that were repeating many times.

Code:
bt@linux-0rk5:~> vivaldi
[31229:31243:0923/212837.951903:ERROR:service_manager_context.cc(277)] Attempting to run unsupported native service:
bt@linux-0rk5:~> [31303:31319:0923/212839.464503:ERROR:service_manager_context.cc(277)] Attempting to run unsupported native service: /usr/lib64/vivaldi/chrome_renderer.service
[31629:31629:0923/212845.736350:ERROR:sandbox_linux.cc(379)] InitializeSandbox() called with multiple threads in process gpu-process.
I'm on Tumbleweed (updated today 2021-09-23)

Code:
Kernel: 5.14.5-1-default x86_64 bits: 64 
Desktop: KDE Plasma 5.22.5  
Distro: openSUSE Tumbleweed 20210921

My version of vivaldi is from :

Code:
Dépôt                     : packman
Nom                       : vivaldi
Version                   : 2.1.1337.51-1.2
Architecture              : x86_64

Any suggestions ?

Regards,
BT