Lightroom Classic v11.3 Export of JPG's is not possible anymore

Hi.

I've got the problem that after the update to Lightroom Classic v11.3 no export of a jpg is possible anymore. The export starts normally and also the files get shown in the folder, but after a short time, the files disappear and I get a failure message, that the export was not possible.

I'm using a MacBook Pro 2017 with macOS Monterey 12.4 with 3,1 GHz Dual-Core Intel Core i5 and 

16 GB 2133 MHz LPDDR3.

.

After desinstallation of v11.3 and installation of v11.2, everything worked fine again.

Have I made anything wrong? Do I have to change setting at Lightroom or do I have to change settings at my MacBook?

I had the same issue after updating to v11.3.1 and v11.4...

Maybe you could help...

Thank you!

Cheers,

Lars