> For the complete documentation index, see [llms.txt](https://help.santesuite.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.santesuite.org/knowledgebase/sdb-kb/after-installing-dcdr-you-receive-an-error-on-securityuser.md).

# After Installing dCDR you receive an error on SecurityUser

**Issue:** When using the SanteDB dCDR (Gateway, Android App, etc.) , upon login you are presented with an error indicating that a property cannot be read on SecurityUser.

**Applies To:**

* SanteDB dCDR Gateway Kelowna (Version 2.0.22+)
* SanteDB dCDR Android Application (Version 2.0.22+)
* SanteDB dCDR Windows Application  (Version 2.0.22+)
* SanteDB dCDR Linux Application  (Version 2.0.22+)

**Symptoms:**

* Upon login, you receive an error about a property of SecurityUser

**Cause:** The issue is caused because the dCDR host service is not yet completed its startup process, and has not yet loaded the specified tables and services into memory.

**Solutions:**

* Wait up to a minute and then attempt login again.