Problem with 1.6.8

Development Tools IDE 1.x
1

I made a clean installation of version 1.6.8 (latestly I used 1.6.1)

Try to use an old sketch only with the library LiquidCrystal_I2C

I get an error:
WARNING: Category '' in library UIPEthernet is not valid. Setting to 'Uncategorized'

I don't call other libraries.

2

It's a warning, not an error :wink:

Going back to the previous version an option?