Does this mean you have previous data that you could open in the same way, but it no longer works?
If these are Bruker data, I would recommend you avoid their DICOM export, I’ve never found it to be particularly reliable. If you have the original raw 2dseq, you can convert that using @spinicist’s nanconvert (currently being discussed in this thread) or at a push MRtrix’s convert_bruker script (supplied with the main installation) – though the latter is a quick attempt I made at handling these types of data a while back, and is not perfect by any means (some discussion of some of the remaining limitations here).
Otherwise, I will just reiterate the approach I’d suggested previously: