I have just installed Eramba using Docker on Ubuntu. The version is Eramba Community v. 3.27.1.
All seems to be fine, except for when I go to Settings > General Settings > PDF Configuration. When I create a test PDF it turns out to be in landscape, and the version to compare it is portrait.
I have also tested with a policy, and that too is displaying as portrait. I tried changing regional settings to see if that could be a problem, but it appears not. I have included a link to the test output, and example of a policy PDF. PsiTransfer. Note that this link will last only for 1 week.