Importing IES lights from Erco product site crashes Unreal

Importing IES lights from Erco website crashes Unreal. I have tested this on different computers and previous versions and it is still happening on version 4.21.
Ies files from some other sources I have tested seem to work fine.It is really frustrating, as Erco is an excellent source for architectural lighting. Anyone else having the same problem?

Maybe you can open the IES files with an IES viewer and resave them?

Great suggestion! I converted the original files from IES to LDT, and then back to IES using an online converter. I’m not sure what the problem was but that fixed the crashes, thank you!

Got exactly the same problem with erco)!Tnx