PROBLEM
During import of LibraCyber ESG OVA image, vShpere remains still in uploading at 0% with no error logs.
SOLUTION
Due to a well known limitation of VMware vSphere, uploading a big file may randomly fail.
Converting the OVA image to OVF one using VMWare ovftool.exe will workaround the issue.
You can download the tool here https://developer.vmware.com/web/tool/4.4.0/ovf, or just use a Zip file extractor.
Then try to upload it newely.