Portainer failed to save stack file

[maveice]

Hi support team,

currently I am receiving the attached error msgs. during the stack backup process of portainer after almost all stacks have been processed. As a result NO more stack is beeing backed up any more in the backup directory (has lots od sapce available).
The error message points at the API (pls. see below).

Help is very much appreciated.
Thank you!

---

Takeout:
...
→ /backup/DSwarm-LAN4all/ct-tdarr-node-01.docker-compose.yaml ... ⚠ (OVERWRITE)
→ /backup/DSwarm-LAN4all/nrpm.docker-compose.yaml ... ✔
→ /backup/DSwarm-LAN4all/unmanic-n2.docker-compose.yaml ... ✔
→ /backup/DSwarm-LAN4all/unmanic-n3.docker-compose.yaml ... ✔
→ /backup/DSwarm-LAN4all/unmanic-n1-server.docker-compose.yaml ... ✔
→ /backup/DSwarm-LAN4all/proxy-squid-pvpn.docker-compose.yaml ... ⚠ (OVERWRITE)
→ /backup/DSwarm-LAN4all/portainer-backup-dswarm-privatepvpn.docker-compose.yaml ... ⚠ (OVERWRITE)
Downloading & save stack files :
→ saving (stack #9) [speedtest-tracker.docker-compose.yml] ... ✖
┌────────────────────────────────────────────────────────────────────────────────────────────┐
│ ✖ Portainer failed to save stack file: (stack #9) [speedtest-tracker.docker-compose.yml] │
└────────────────────────────────────────────────────────────────────────────────────────────┘
┌──────────────────────────────────────────────────────────────────┐
│ ✖ -------------------------- ERROR -------------------------- ✖ │
├───────────────┬──────────────────────────────────────────────────┤
│ ERROR MESSAGE │ Request failed with status code 500 │
├───────────────┼──────────────────────────────────────────────────┤
│ API RESPONSE │ 500 (Internal Server Error) │
│ STATUS │ │
└───────────────┴──────────────────────────────────────────────────┘
┌──────────────────────────────────────────────────────────────────┐
│ ✖ -------------------------- ERROR -------------------------- ✖ │
├───────────────┬──────────────────────────────────────────────────┤
│ ERROR MESSAGE │ This error originated either by throwing inside │
│ │ of an async function without a catch block, or │
│ │ by rejecting a promise which was not handled │
│ │ with .catch(). The promise rejected with the │
│ │ reason "AxiosError: Request failed with status │
│ │ code 500". │
└───────────────┴──────────────────────────────────────────────────┘
[UnhandledPromiseRejection: This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). The promise rejected with the reason "AxiosError: Request failed with status code 500".] {
code: 'ERR_UNHANDLED_REJECTION'
}
┌────────────────────────────────────────────────────────┐
│ ⚠ TERMINATE SIGNAL DETECTED: - uncaughtException - │
└────────────────────────────────────────────────────────┘
-------- GOODBYE --------