Reproduction steps:
1. Create a new project
2. Open the Package Manager Window (Window > Package Manager)
3. Add the “Entities” package
4. Add the “Netcode for GameObjects” package
5. Observe the Console Window

Expected result: No errors or warnings are thrown
Actual result: Three “Library/PackageCache/com.unity.transport@1.4.1/Runtime/IPCManager.cs(79,44): error CS1955: Non-invocable member 'NativeHashMap<ushort, int>.Count' cannot be used like a method” and one “Failed to find entry-points” errors are thrown

Reproducible with: 1.4.1 (2022.3.41f1)
Not reproducible with: 2.3.0 (6000.0.14f1)
Could not test with: 2021.3.41 (The Entities package is not available for that Editor version)

Reproducible on: MacOS Sonoma 14.5 (Intel), Windows 11 (user’s)
Not reproducible on: No other environment tested

Note: The issue does not appear when the “Entities” package is not installed