SplunkMint uploading dSym

Question

I am receiving this error every time I try to run the following script (SplunkMint script to upload the dsym file automatically in order to symbolicate):

SCRIPT=`/usr/bin/find "${SRCROOT}" -name splunkmint_postbuild_dsym_upload_script.sh | head -n 1`

/bin/bash "${SCRIPT}" "API_KEY" "API_TOKEN"

I put my API_KEY and API_TOKEN but they are hidden for security reasons.

Splunk Mint: Archiving "appName" to "/tmp/splunk-mint-dsyms/appName.zip"
  adding: appName (deflated 72%)
Splunk Mint: ERROR "400" while uploading "/tmp/splunk-mint-dsyms/appName.zip"
Command /bin/sh failed with exit code 252

I don't know what can cause this issue, I just used other previous versions that I didn't had the issue and now I do.

I am using Swift 4 and Xcode 9.2, Thanks.