Never mind, thanks. The upgrade to 5.1.1 fixed the issue.
Thanks Platypus.
@RexBlock, you seem to be using an outdated version of DPL.
You might want to try with an updated version, which is 5.1.1 build 52.
→ Keep the old installer or a backup - if you want to be able to fall back to your (old) version.
Yes I just noticed that, thanks. Imma gonna try 5.1.1 and see if it happens there. Thanks.