AutoRest Exception Error: Could not read 'file:///preview/2023-06-01-preview/privateLinkScopes_API.json'. at ReadThroughDataSource.readStrict

[qinjoshua]

I ran into this error while trying to validate the following PR:
https://github.com/Azure/azure-rest-api-specs/pull/31826/checks?check_run_id=35680843020

The full text of one of the error messages looks like this:

"tag":"[package-2023-06-01-preview](https://github.com/Azure/azure-rest-api-specs/blob/1290718c264d997f7e43745dbae1548214125eb3/specification/monitor/resource-manager/Microsoft.Insights/PrivateLinkScopes/readme.md#tag-package-2023-06-01-preview)",
"details":"stack: Error: Could not read 'file:///preview/2023-06-01-preview/privateLinkScopes_API.json'. at ReadThroughDataSource.readStrict (/home/cloudtest/.autorest/@[email protected]/node_modules/@autorest/core/dist/src_lib_autorest-core_ts.js:15002:19) at loadSwaggerFile (/home/cloudtest/.autorest/@[email protected]/node_modules/@autorest/core/dist/src_lib_autorest-core_ts.js:3590:18) at loadSwaggerFiles (/home/cloudtest/.autorest/@[email protected]/node_modules/@autorest/core/dist/src_lib_autorest-core_ts.js:3581:29) at /home/cloudtest/.autorest/@[email protected]/node_modules/@autorest/core/dist/src_lib_autorest-core_ts.js:3604:26 at ScheduleNode (/home/cloudtest/.autorest/@[email protected]/node_modules/@autorest/core/dist/src_lib_autorest-core_ts.js:1351:29)"

I've verified that the file /preview/2023-06-01-preview/privateLinkScopes_API.json does exist in my PR at the specified folder, and the error message itself is too cryptic for me to understand what specifically AutoRest is trying to do. Why does this error get generated, and what can I do to fix it?