Update commonUtils.ts (#3470)

Fixed a bug in `restructureMessages` leading to blowing up of the message content with escape characters and eventually crashing the flow with "repetitive patterns" error

packages/components/nodes/sequentialagents/commonUtils.ts

@@ -212,7 +212,7 @@ export const restructureMessages = (llm: BaseChatModel, state: ISeqAgentsState)
     const messages: BaseMessage[] = []
     for (const message of state.messages as unknown as BaseMessage[]) {
         // Sometimes Anthropic can return a message with content types of array, ignore that EXECEPT when tool calls are present
-        if ((message as any).tool_calls?.length) {
+        if ((message as any).tool_calls?.length && message.content !== '') {
             message.content = JSON.stringify(message.content)
         }