Hi, the first thing to tackle is that there is an issue with the quantitative reference. Validate the database, this should provide more information about the quantitative reference.
The Julia libraries make the calculation much faster but if they are not present the calculation still works. If download does not work, or they can't be loaded even after you downloaded them, then you do not have write access to the folder where openLCA is installed (and where the libraries will be added). In that case, download the zip archive version of openLCA and extract it in your user directory, and download the Julia libraries then.