after effects in adobe media encoder export stops just before each export completes

Hi,

for a few days now, every time I export an after effects project in adobe media encoder in H.264 format, the export stops at the very end of the export and doesn't advance any further.
I don't understand why. It's a very simple video, in this case a video of barely 20 seconds and very little power.

In the attachment, the export was blocked like that for 2 hours

Would you have a solution?

Thanks a lot.