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Error from API call _reload-hash

Hi,
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 !!