If you are still using the PnP-Sites-Core library (consider migrating to the new version: PnP Framework!) and using access tokens to connect to SharePoint, there may be scenarios where you will get the error message: IDX12729: Unable to decode the header ‘[PII]’ is hidden’ as Base64Url encoded string.
Continue reading “IDX12729: Unable to decode the header ‘[PII]’ is hidden’”IDX12729: Unable to decode the header ‘[PII]’ is hidden’
![IDX12729: Unable to decode the header '[PII]'](https://web365devp-ca10f981c1-dchnbacfgzbjdqcq.z02.azurefd.net/blobweb365devpca10f981c1/wp-content/uploads/2021/03/laptop-5906264_1280.png)