robshep opened a new issue, #29954:
URL: https://github.com/apache/superset/issues/29954
### Bug description
Fresh 4.0.2 launched using:
```
export TAG=4.0.2-dev
docker compose -f docker-compose-image-tag.yml up
```
Needed to adjust some settings to get auth working for embedded
authentication:
namely
```
FEATURE_FLAGS = {"ALERT_REPORTS": True, "EMBEDDED_SUPERSET": True,
"THUMBNAILS": True, "THUMBNAILS_SQLA_LISTENERS": True,}
GUEST_ROLE_NAME = "Gamma"
GUEST_TOKEN_JWT_EXP_SECONDS = 3600
WTF_CSRF_EXEMPT_LIST = ['superset.security.api.guest_token',
"superset.views.core.log",
"superset.views.core.explore_json",
"superset.charts.data.api.data"
]
TALISMAN_DEV_CONFIG = {
"content_security_policy": {
"base-uri": ["'self'"],
"default-src": ["'self'"],
"img-src": [
"'self'",
"blob:",
"data:",
"https://apachesuperset.gateway.scarf.sh",
"https://static.scarf.sh/",
"https://avatars.slack-edge.com",
],
"worker-src": ["'self'", "blob:"],
"connect-src": [
"'self'",
"https://api.mapbox.com",
"https://events.mapbox.com",
],
"object-src": "'none'",
"style-src": [
"'self'",
"'unsafe-inline'",
],
"script-src": ["'self'", "'unsafe-inline'", "'unsafe-eval'"],
},
"content_security_policy_nonce_in": ["script-src"],
"force_https": False,
"session_cookie_secure": False,
"frame_options": "ALLOW-FROM",
"frame_options_allow_from": "*"
}
THUMBNAIL_CACHE_CONFIG = CACHE_CONFIG
```
But whilst the sample dashboard "births" loads for for admin in the normal
web application... the embedded view just shows the following messages.

### How to reproduce the bug
Fresh 4.0.2 launched using:
```
export TAG=4.0.2-dev
docker compose -f docker-compose-image-tag.yml up
```
### Screenshots/recordings
_No response_
### Superset version
4.0.2
### Python version
I don't know
### Node version
I don't know
### Browser
Chrome
### Additional context
_No response_
### Checklist
- [X] I have searched Superset docs and Slack and didn't find a solution to
my problem.
- [X] I have searched the GitHub issue tracker and didn't find a similar bug
report.
- [X] I have checked Superset's logs for errors and if I found a relevant
Python stacktrace, I included it here as text in the "additional context"
section.
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