The Odin Serializer has two sets of assemblies; One set for AOT platforms and one for those platforms where JIT is supported. JIT is usually the most performant, but it is not supported on all platforms. Finding out whether your setup supports it goes beyond what Unity's import settings have to offers.
If you are encountering exceptions when deserialization in your build, then the most common reasons is that you've accidentally built with the JIT assemblies to a platform where JIT is not supported.
To fix this you will have to change the import settings of Odin's assemblies.
The easiest way to do this is to go to Tools > Odin Inspector > Preferences > Import Settings. Here you will find an option to select either the JIT or AOT assemblies and which option we recommend using based on your current build settings, and you can hit the apply button to make the change.
If you are working with a Unity version 5.6 or newer, then you can also use the automated feature. Turning this on will enable a preprocess build step that should configure Odin's assemblies correctly when the player is built.
If you've stumbled on a setup where we're using AOT when we could be using JIT or the other way around, then you can always disable the preprocess build set and manually configure your assemblies.
We would also very much appreciate it if you reported this to us so that we can address this in a future version of Odin.