Self-hosting (ubuntu) error (private project)

Post Cache node modules12m 21s
at FSReqCallback.wrapper [as oncomplete] (fs.js:470:5)
Post job cleanup.
/bin/tar -z -cf cache.tgz -P -C /home/pi/actions-runner/_work/pwa/pwa --files-from manifest.txt
[warning]uploadChunk (start: 0, end: 33554431) failed: Cache service responded with 503
/home/pi/actions-runner/_work/_actions/actions/cache/v2.0.0/dist/save/index.js:2440
throw new Error(Cache upload failed because file read failed with ${error.Message});
^

Error: Cache upload failed because file read failed with undefined
at ReadStream. (/home/pi/actions-runner/_work/_actions/actions/cache/v2.0.0/dist/save/index.js:2440:31)
at ReadStream.emit (events.js:210:5)
at internal/fs/streams.js:167:12
at FSReqCallback.wrapper [as oncomplete] (fs.js:470:5)