Not solved.
I changed a name to a strategy that I use on all my pairs, and now I can't do anything on the GUI.
This is definitely a BUG: the strategy name CANNOT BE CHANGED if it is used in some pairs.
Now the GUI is not loading, so I'll have to resolve by hand.
Edit: ok verified and solved.
The EDIT NAME in strategies only changes the strategy name.
If that strategy is used by some pair, the Gunbot engine will enter this error loop and the user won't be able to fix anything.
I changed the strategy name used in the pairs and now everything is working fine again.
GUNTHAR FIX THIS!!! XD