Deployment frequency stays empty

[thomas_offner_bitmovin_com]

Hello, 

We implemented the syncing between Github and Jira a while back, and it works very well. 

In Jira we see deployments, with the correct issues associated, also we do see a correct Cycle Time in the cycle time record. 

However,
When I want to look at the Deployment Frequency Report, there are no deployments. 

How can I fix this? 

Kind regards,
Thomas