Playground bug: import triggers exceptions

In the following case (Playground link), the module is not imported:

import { type Assert, type Equal, type Not } from 'asserttt';

// Argument of Assert is an error and should be underlined
type _ = Assert<Equal<
  1,
  3
>>;

Several uncaught Promise rejections happen (Chrome/Mac, Safari/Mac, Firefox/Mac):

workerMain.ts:144 Uncaught (in promise) DataCloneError: Failed to execute 'postMessage' on 'DedicatedWorkerGlobalScope': ()=>({moduleReference:r,mode:i,packageName:o===r?void 0:o}) could not be cloned.
    at workerMain.ts:144:23
    at Object.sendMessage (simpleWorker.ts:474:5)
    at L._send (simpleWorker.ts:295:17)
    at simpleWorker.ts:247:9
(anonymous) @ workerMain.ts:144
sendMessage @ simpleWorker.ts:474
_send @ simpleWorker.ts:295
(anonymous) @ simpleWorker.ts:247
Promise.then
_handleRequestMessage @ simpleWorker.ts:246
_handleMessage @ simpleWorker.ts:209
handleMessage @ simpleWorker.ts:178
onmessage @ simpleWorker.ts:482
self.onmessage @ workerMain.ts:147
workerMain.ts:144 Uncaught (in promise) DataCloneError: Failed to execute 'postMessage' on 'DedicatedWorkerGlobalScope': ()=>({moduleReference:r,mode:i,packageName:o===r?void 0:o}) could not be cloned.
    at workerMain.ts:144:23
    at Object.sendMessage (simpleWorker.ts:474:5)
    at L._send (simpleWorker.ts:295:17)
    at simpleWorker.ts:247:9
(anonymous) @ workerMain.ts:144
sendMessage @ simpleWorker.ts:474
_send @ simpleWorker.ts:295
(anonymous) @ simpleWorker.ts:247
Promise.then
_handleRequestMessage @ simpleWorker.ts:246
_handleMessage @ simpleWorker.ts:209
handleMessage @ simpleWorker.ts:178
onmessage @ simpleWorker.ts:482
self.onmessage @ workerMain.ts:147
workerMain.ts:144 Uncaught (in promise) DataCloneError: Failed to execute 'postMessage' on 'DedicatedWorkerGlobalScope': ()=>({moduleReference:r,mode:i,packageName:o===r?void 0:o}) could not be cloned.
    at workerMain.ts:144:23
    at Object.sendMessage (simpleWorker.ts:474:5)
    at L._send (simpleWorker.ts:295:17)
    at simpleWorker.ts:247:9
(anonymous) @ workerMain.ts:144
sendMessage @ simpleWorker.ts:474
_send @ simpleWorker.ts:295
(anonymous) @ simpleWorker.ts:247
Promise.then
_handleRequestMessage @ simpleWorker.ts:246
_handleMessage @ simpleWorker.ts:209
handleMessage @ simpleWorker.ts:178
onmessage @ simpleWorker.ts:482
self.onmessage @ workerMain.ts:147
tsMode.js:8 Uncaught (in promise) Error: Could not find source file: 'file:///file%3A///node_modules/asserttt/package.json'.
    at R (tsWorker.js:396:6471)
    at Object.K [as getSyntacticDiagnostics] (tsWorker.js:396:12131)
    at Du.getSyntacticDiagnostics (tsWorker.js:54410:2643)
    at L.$fmr (workerMain.js:29:82744)
    at v._handleMessage (workerMain.js:29:62387)
    at Object.handleMessage (workerMain.js:29:61908)
    at L._handleRequestMessage (workerMain.js:29:58659)
    at L._handleMessage (workerMain.js:29:58109)
    at L.handleMessage (workerMain.js:29:57722)
    at v.onmessage (workerMain.js:29:62006)
_handleReplyMessage @ simpleWorker.ts:231
_handleMessage @ simpleWorker.ts:207
handleMessage @ simpleWorker.ts:178
(anonymous) @ simpleWorker.ts:344
S.onmessage @ defaultWorkerFactory.ts:153
tsMode.js:8 Uncaught (in promise) Error: Could not find source file: 'file:///file%3A///node_modules/asserttt/dist/src/asserttt.d.ts'.
    at R (tsWorker.js:396:6471)
    at Object.K [as getSyntacticDiagnostics] (tsWorker.js:396:12131)
    at Du.getSyntacticDiagnostics (tsWorker.js:54410:2643)
    at L.$fmr (workerMain.js:29:82744)
    at v._handleMessage (workerMain.js:29:62387)
    at Object.handleMessage (workerMain.js:29:61908)
    at L._handleRequestMessage (workerMain.js:29:58659)
    at L._handleMessage (workerMain.js:29:58109)
    at L.handleMessage (workerMain.js:29:57722)
    at v.onmessage (workerMain.js:29:62006)
_handleReplyMessage @ simpleWorker.ts:231
_handleMessage @ simpleWorker.ts:207
handleMessage @ simpleWorker.ts:178
(anonymous) @ simpleWorker.ts:344
S.onmessage @ defaultWorkerFactory.ts:153

Reproduce the failure with the linked TypeScript Playground example, then inspect the workerMain.ts and simpleWorker.ts paths shown in the stack traces, along with tsMode.js. Done means the import resolves and the example no longer produces uncaught DataCloneError or missing-source-file errors.