Build ios error Invalid Character ()a

hi, im trying to build an IOS image, ive been building them all day yesterday everything running smoothly, i didnt change anything and no this morning it is not building and im getting this problem:

Error: Invalid character () in string: 1.1.3 at index 5

[ERROR] An error occurred while running cordova prepare ios (exit code 1).

the code is exactly the same as last night and will not build.

any help on this will be very greatful.