Hello, 

the workflow don't work and not create serie of meetings automatically

Just to be sure, the workflow only serves to keep the element alive and evolving, here a meeting, over time.
In no case does a workflow create an element by itself.

Otherwise, you have to go through periodic meetings and not meetings.
In any case, we do not reproduce this kind of problem on the periodic meetings on our side.

Did you test on our demonstration instance?
Are there any errors in the logs or in the console?
Which version are you talking about for the last ?

I just tested and could not reproduce.
Please try and reproduce on Demo.
Post any error logged (in projeqtor log file and in browser console)

I tested on the Demo environment and it's OK

I had check on my environment and i found the meetings created but close automatically. To resolve the issue I reopened all meetings and it is OK. I don't know why they were closed automatically.

I know now what i must do when i don't find new meeting, i will check on cloded meetings

Thank you for your help

Check the workflow you defined for meetings.