If you're using a version of dry-struct since 1.2.0, you'll get the following scary warning.
[dry-struct] Dry::Struct::Value is deprecated and will be removed in the next major version
/Users/sal/Development/temporal-ruby/lib/temporal/concerns/typed.rb:35:in `generate_struct'
Here are the dry-struct release notes.
The fix should (🤞🏼) be pretty straightforward and I'll open it in a few minutes.