The root cause of this error is that the initialize_tools method in the Swarms class is passing an instance of OpenAI to the load_qa_with_sources_chain function, which then passes it to the LLMChain constructor. The LLMChain constructor expects a dictionary for the llm parameter, but it's receiving an instance of OpenAI instead.

swarms/swarms.py

@@ -13,7 +13,8 @@ class Swarms:
         # Initialize language model
         return llm_class(openai_api_key=self.openai_api_key)
 
-    def initialize_tools(self, llm):
+    def initialize_tools(self, llm_class):
+        llm = self.initialize_llm(llm_class)
         # Initialize tools
         web_search = DuckDuckGoSearchRun()
         tools = [