Error Invoking (Screen doesn't open)

I was working on this screen when a connection error with the server occur.
After that asked me to retrive the project. Once I did’t the screen was frozen. The window was closed and when try to reopen the next error come out
“Error Invoking [PMILabel]Label 4.setStyles (Dataset [2R X 5C])”
"SerializationException: Error invoking [PMILabel]Label 4.setStyles(Dataset [2R ⅹ 5C])
caused by InvocationTargetException
caused by ClassCastException: Error trying to coerce ‘value 1’ to a number.

Ignition v7.9.5-rc1 (b2017103014)
Java: Oracle Corporation 1.8.0_151

Any idea how to solve this?