Orthanc with Oem Pacs

Hello,

Have an Oem Pacs trying to make Q/R to Orthanc ver 18.9.3 but when the images are loaded the screen of the viewer is black
Going back to Orthanc ver 17.6.1 the images are loaded as right
How can I check the Dicom association where is falling?
Thanks

Massimo

Please provide a sample DICOM image so that we can try and reproduce your issue.

S├ębastien-