Error from API call _reload-hash

I 'm having some errors in the code but I can’t solved because I can’t see the details.
Every second appears a message error in the screen that do not allow to do anything.

There is any way to stop this?
I stoped the code but the message do not stop.
I think is related with the “hot reload” but I do not understand how it works.
Thanks in advance !!

Hello! Were you able to deal with this error? If so, how? I have the same error in my Dash app

Yes, I solved when I reinstalled all the programs (Python, Anaconda and Dash), I do not know which of them has the issue but it worked.