Reverse Proxy, Blank Screen, error: MIME type of ""

Hello,

Having trouble getting a LAN docker-compose instance accessible behind a caddy reverse proxy. I can access /api/v1/info. However, the main url returns 200, but a black screen and a MIME type of ““ error.

Caddyfile:

192.168.0.132 {
	handle_path /vikunja/* {
		reverse_proxy localhost:3456 {
			header_up X-Script-Name /vikunja
		}
	}
}

Vikunja docker yaml:

...
environment:
      VIKUNJA_SERVICE_PUBLICURL: https://192.168.0.132:4430/vikunja/
...

Errors:


Failed to load module script: Expected a JavaScript-or-Wasm module script but the server responded with a MIME type of "". Strict MIME type checking is enforced for module scripts per HTML spec.
Error with Permissions-Policy header: Unrecognized feature: 'browsing-topics'.
Error with Permissions-Policy header: Unrecognized feature: 'run-ad-auction'.
Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'join-ad-interest-group'.
Error with Permissions-Policy header: Unrecognized feature: 'private-state-token-redemption'.
Error with Permissions-Policy header: Unrecognized feature: 'private-state-token-issuance'.
Error with Permissions-Policy header: Unrecognized feature: 'private-aggregation'.
Error with Permissions-Policy header: Unrecognized feature: 'attribution-reporting'.

Any help much appreciated.