Error: ENOENT: no such file or directory

[DanisHack]

I am trying to combine 7 videos (5sec or 3sec) with the transition's duration of 500ms. I am getting this error. What could be the possible reason?

{"log":"ffmpeg concat error { Error: ENOENT: no such file or directory, open '/tmp/002d8321e0717ebf54d05c3a0884a9cb/scene-2-000000000014.raw'\n","stream":"stdout","time":"2020-05-21T11:19:49.452340471Z"}

{"log":" at Object.openSync (fs.js:443:3)\n","stream":"stdout","time":"2020-05-21T11:19:49.452359422Z"} {"log":" at Object.readFileSync (fs.js:343:35)\n","stream":"stdout","time":"2020-05-21T11:19:49.452364682Z"} {"log":" at module.exports (/app/node_modules/ffmpeg-concat/lib/get-pixels.js:15:21)\n","stream":"stdout","time":"2020-05-21T11:19:49.452369312Z"} {"log":" at Object.draw (/app/node_modules/ffmpeg-concat/lib/transition.js:49:28)\n","stream":"stdout","time":"2020-05-21T11:19:49.452374102Z"} {"log":" errno: -2,\n","stream":"stdout","time":"2020-05-21T11:19:49.452378792Z"} {"log":" syscall: 'open',\n","stream":"stdout","time":"2020-05-21T11:19:49.452383052Z"} {"log":" code: 'ENOENT',\n","stream":"stdout","time":"2020-05-21T11:19:49.452386941Z"} {"log":" path:\n","stream":"stdout","time":"2020-05-21T11:19:49.452390681Z"} {"log":" '/tmp/002d8321e0717ebf54d05c3a0884a9cb/scene-2-000000000014.raw' }\n","stream":"stdout","time":"2020-05-21T11:19:49.452395101Z"} {"log":"{\"level\":20,\"time\":1590059989452,\"pid\":25,\"hostname\":\"de07e9d06376\",\"ns\":\"app-video-encoder\",\"msg\":\"error generating preview: Error: ENOENT: no such file or directory, open '/tmp/002d8321e0717ebf54d05c3a0884a9cb/scene-2-000000000014.raw'\"}\n","stream":"stdout","time":"2020-05-21T11:19:49.452399301Z"}