Python toolbox - tool connection is broken when open ArcGIS Pro

[Rakefet]

Hi,

I created a Python toolbox with multiple tools and connect it to my project. When I save my project and open it again, the toolbox is shown in the catalog but when I click on it to see the tools , I am getting the broken connect symbol. I still can select edit and see my script but I can not use the tool because the connect is broken. If I right-click on the tool to see the properties, the connection is back. Any idea why this is happening?  
I am using ARcGIS pro 2.8. This bug is new. I used this toolbox a month ago with no problem.

thank for any inputs

[DanPatterson]

same project? same toolbox pre and post update?

location of the toolbox relative to the location of the aprx?

spaces or other unsafe characters in the path or toolbox name?

I just checked all mine with no issue at all

[Rakefet]

Thanks for the quick respond.

Same project and same toolbox. Maybe updated it a little. The pyt file is in a different folder than the aprx.  For demonstration,  I just created a test.pyt file with mytest tool, saved the project and opened it again:

after right click and refreshing test.pyt,  I am getting the connection back:

 

 

[DanPatterson]

no wonder.... you were trying to put a toolbox in a custom toolbox

What is a Python toolbox?—ArcGIS Pro | Documentation

don't... when you make a python toolbox, you just add it to the project

[Rakefet]

Thanks. I added the tool to the project and it still did not work. What did the trick was deleting the line code:  map = aprx.activeMap

[DanPatterson]

I guess showing the code would have been useful too 😉

[Rakefet]

the curse of cut and paste from an old script...