Hi all and thank you in advance for your help.
I try to import a backed lightmap exr 32 bit. Some time it import without issue but sometime during the conversion to png it hangup remaining with a orange/red circle or bar.
The png is not generated and there is no error message.
https://playcanvas.com/editor/scene/1009898
Thanks
Vittokun
I can reproduce the error 100% on my side, it never succeeds …
As a work around, I tried to convert your .exr file to .hdr file using this:
https://www.freefileconvert.com/exr-hdr
and then imported .hdr and that worked … not ideal, but see if that works for you in the meantime?
Thank you mvaligursky for the fast answer.
Yes the hdr format seem to import without issues.
Thank you!! 
exr import has not been fixed.