Error: Object of type CallbackManagerForToolRun is not JSON serializable in LangGraph_03_MultiAgent_With_Supervisor.ipynb

[araujo-alexdias]

When I run this block of code it gives me this:
for s in graph.stream(
{
"messages": [
HumanMessage(content="Code hello world and print it to the terminal")
]
}
):
if "end" not in s:
print(s)
print("----")
this error below:

{'supervisor': {'next': 'Coder'}}

WARNING:langchain_experimental.utilities.python:Python REPL can execute arbitrary code. Use with caution.

TypeError Traceback (most recent call last)
in <cell line: 1>()
----> 1 for s in graph.stream(
2 {
3 "messages": [
4 HumanMessage(content="Code hello world and print it to the terminal")
5 ]

35 frames
/usr/lib/python3.10/json/encoder.py in default(self, o)
177
178 """
--> 179 raise TypeError(f'Object of type {o.class.name} '
180 f'is not JSON serializable')
181

TypeError: Object of type CallbackManagerForToolRun is not JSON serializable

any ideas?