Media Encoder 2017 isn't working anymore ?!?!?

Hi, 

We need to use media encoder 2017 to convert PhotoJpeg videos.

Since my coworker update his mac OS (from high sierra to mojave) he get that message =>

"Thank you for using Adobe Media Encoder. The grace period for this product has expired. In order to continue using.........please purchase a creative cloud subscription"

My computer is still on High Sierra, but I get the same message when trying to open it.

We have a creative cloud subscription, media encoder 2019 / 2020 and 2021 work !

But we need Photo JPEG converter which disappear after 2017.....

thanks