HTTPS became unavailable

[danswartzendruber]

Issue Description

Attempt to login to web portal failed with a 500 server error.

No recent changes.

Stalwart Server v0.15.4

Running in a Proxmox Debian 13

Resolved by rebooting the VM.

Expected Behavior

Expected login window for Stalwart.

Actual Behavior

Server threw a 500 error.

Reproduction Steps

No reproduceable testcase.

Relevant Log Output

2026-04-08T15:54:45Z ERROR Resource error (resource.error) listenerId = "https", localPort = 443, remoteIp = 10.0.0.10, remotePort = 62343, reason = "No such file or directory (os error 2)", path = "", causedBy = "crates/common/src/manager/webadmin.rs:62"
2026-04-08T15:54:45Z ERROR Resource error (resource.error) listenerId = "https", localPort = 443, remoteIp = 10.0.0.10, remotePort = 62344, reason = "No such file or directory (os error 2)", path = "favicon.ico", causedBy = "crates/common/src/manager/webadmin.rs:62"

Stalwart Version

v0.15.x

Installation Method

Binary (Linux)

Database Backend

RocksDB

Blob Storage

RocksDB

Search Engine

Internal

Directory Backend

Internal

Additional Context

No response

I acknowledge that:

• I have reviewed the documentation and FAQ and confirm that my issue is NOT addressed there.
• I have searched the Stalwart repository (both open and closed Discussions and Issues) and confirm this is not a duplicate.
• I have set the logging level to trace and included relevant log output if applicable.
• I agree to follow the project's Code of Conduct.