[Bug] FalconCustomIOC responder Not working

Describe the bug
Installing FalconCustomIOC responder and configure it by adding the Client ID and secret key in Cortex.
When executing the responder from TheHive, there isn't any result shows and shows failed as result

To Reproduce
Steps to reproduce the behavior:

1. Configure FalconCustomIOC responder by adding the Client ID and secret key in Cortex GUI
2. Go to an observable to theHive and run the responder

Expected behavior
The observable should be added to IOC list in CrowdStrike.

Complementary information
Error message in responder details:
"errorMessage": "Unexpected end-of-input within/between Object entries\n at [Source: (sun.nio.ch.ChannelInputStream); line: 1, column: 1257]"

Work environment

• Client OS: Windows 10
• Server OS: Linux
• Browse type and version: Firefox
• Cortex version: 3.0.0-1
• Cortex Analyzer/Responder name: FalconCustomIOC
• Cortex Analyzer/Responder version: 1.0

Possible solutions
If applicable, indicate possible solutions to the problem.

Additional context
Add any other context about the problem here.

No file or test is named in the issue. Start by reproducing the FalconCustomIOC responder failure from TheHive with Cortex 3.0.0-1 and inspect the responder details for the JSON parsing error. Done means the observable is added to CrowdStrike's IOC list without a failed result.