issue with missing reference

[burningman2k20]

im not sure whats going on by the code is some how missing a component, which is part of the microsoft csharp code. this is the message im getting. im using the new Unity 6 engine. im going to try importing it using an older version of unity (such as 2023)

Assets\Depiction Engine\Runtime\Helper\Utility\FastMember\CallSiteCache.cs(4,24): error CS0234: The type or namespace name 'RuntimeBinder' does not exist in the namespace 'Microsoft.CSh\arp' (are you missing an assembly reference?)

[burningman2k20]

nope. error still happens with unity 2022.3.21f1