I have had no joy with getting a scan to complete on a LiteSpeed server either. I have loaded v5.0.7.
The first few times it was doing about four things at once (core, themes, plugins, malware) but not saying anything about progress with files in the details.
Scan Summary:
Scan hangs here, with these four just spinning.
Comparing core WordPress files against originals in repository
Comparing open source themes against WordPress.org originals
Comparing plugins against WordPress.org originals
Scanning for known malware files
Scan Detailed Activity
Scan hangs here,
[May 16 05:20:32] Analyzed 200 files containing 2.07 MB of data so far
There are no errors to be seen anywhere that I have access to, it just seems to stop making any progress.