AES Locked - Cannot Add Data, Experience, or Security

[Prinssi]

Seeing the same App Engine Studio issue occur in both my company's instance and my own PDI.  The Data, Experience, and Security options are all locked, and I am unable to add.  Here's what that looks like:

Another error message also started appearing in AES at the same time: "We encountered an error while fetching templates."  This also occurs in both company instance and PDI.

In my PDI, System Administrator has the same error message and locked Data, Experience, and Security for all apps, new and existing.

Troubleshooting I've done already:
- Checked roles, and do have sn_app_eng_studio.user in both

- Tried running through the AES guided setup again in PDI

- Tried repairing AES in PDI

- Searched high and low in community for someone else with the same issue

- Read through the docs backwards and forwards multiple times

[Tae Kyung Lee]

Me,too.

I found 2 logs seems to be related this error.

Template Error: com.glide.rest.domain.ServiceException: Template Error: com.snc.templates.api.TemplatesREST.getTemplates(TemplatesREST.java:163)

Alias with id: cb3b28e87355001044022ea3c4f6a734 was not found: no thrown error

[ColeM · Accepted solution]

I was able to fix the issue in App Engine Studio based on the following advice from ServiceNow: 

1. Uninstall all of the Flow Templates for plugins, this consists of the following plugins (8 total):
- Flow Templates for HR Management
- Flow Templates for CRM
- Flow Templates for Integration Hub Enterprise
- Flow Templates for Notifications
- Flow Templates for Document Management
- Flow Templates for Access Management
- Flow Templates for DevOps
- Flow Templates for Cloud Services
2. Repair the AES Flow Templates plugin
3 . Verify the sys_app_template_dependency table does not contain any (empty) references on the Dependency Definition column, if it does not then the GET templates call should return successfully. If there are (empty) references, proceed to step 4.
4. Repair the AES Application Object Templates plugin