Hi,
We are very soon planning to make a release of Lyo 6.0.0. Towards that, we today just released the candidate 6.0.0.RC.
For the Lyo SDK, the biggest change is the move from Javax to Jakarta packages & the upgrade to Jersey 3.1.5.
See the complete release notes
So, please try switching to 6.0.0.CR in your maven dependencies.
For LyoDesigner, update using the site Eclipse software repository | The Eclipse Foundation. Or download the latest binary from Project download area | The Eclipse Foundation.