Error Using VSCode Effect Extension with 'Hello' Example from GitHub Repo

I am trying to use the VSCode Effect Extension. I copied the 'Hello' example from the GitHub repo. I am using Effect v3.6.0. I get this error
1112 |   const iss = [];
1113 |   for (const r of records) {
1114 |     const {
1115 |       indexSignatures,
1116 |       propertySignatures
1117 |     } = AST.record(r.key.ast, r.value.ast);
                                       ^
TypeError: undefined is not an object (evaluating 'r.value.ast')
      at getDefaultTypeLiteralAST (/Users/paul/testblog/node_modules/@effect/schema/dist/cjs/Schema.js:1117:33)
      at makeTypeLiteralClass (/Users/paul/testblog/node_modules/@effect/schema/dist/cjs/Schema.js:1137:54)
      at makeRecordClass (/Users/paul/testblog/node_modules/@effect/schema/dist/cjs/Schema.js:1208:72)
      at /Users/paul/testblog/node_modules/@effect/experimental/dist/cjs/DevTools/Domain.js:73:35
      at /Users/paul/testblog/node_modules/@effect/experimental/dist/cjs/DevTools/Client.js:20:14
      at /Users/paul/testblog/node_modules/@effect/experimental/dist/cjs/DevTools.js:9:14
      at /Users/paul/testblog/node_modules/@effect/experimental/dist/cjs/index.js:7:17
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