Edited: The release of the sandbox is 2021.1, if curious

I have installed the current version (6.00.5) of SuiteApprovals on my sandbox environment.

After setting up a simple department approver list and an approval rule, when I try to save the sales order, an error message returns:

{"type":"error.SuiteScriptError","name":"UNEXPECTED_ERROR","message":"illegal character (NLRecordScripting.scriptInit$lib#5846)","stack":["createError(N/error)","trigger(/SuiteBundles/Bundle 203059/com.netsuite.suiteapprovals/src/lib/WD_SAP_WorkflowWrapper.js:12)","initiateWorkflow(/SuiteBundles/Bundle 203059/com.netsuite.suiteapprovals/src/scripts/ue/WD_SAP_UE_ForSupportedRecordTypes.js:816)","afterSubmit(/SuiteBundles/Bundle 203059/com.netsuite.suiteapprovals/src/scripts/ue/WD_SAP_UE_ForSupportedRecordTypes.js:162)"],"cause":{"type":"internal error","code":"UNEXPECTED_ERROR","details":"illegal character (NLRecordScripting.scriptInit$lib#5846)","userEvent":"aftersubmit","stackTrace":["createError(N/error)","trigger(/SuiteBundles/Bundle 203059/com.netsuite.suiteapprovals/src/lib/WD_SAP_WorkflowWrapper.js:12)","initiateWorkflow(/SuiteBundles/Bundle 203059/com.netsuite.suiteapprovals/src/scripts/ue/WD_SAP_UE_ForSupportedRecordTypes.js:816)","afterSubmit(/SuiteBundles/Bundle 203059/com.netsuite.suiteapprovals/src/scripts/ue/WD_SAP_UE_ForSupportedRecordTypes.js:162)"],"notifyOff":false},"id":"","notifyOff":false,"userFacing":false}