in this specific world when i try to save litematica file it shows an error

@kingsmtl replace the '*' with something else

Was this solved by changing the file name, or is there an actual issue deeper in the mod?

Note that there was a similar issue report recently, which turned out to be caused by the TweakerPlus mod's change to Litematica. In that case disabling the "embedded origin point in schematic" feature or whatever it's called should fix the crash. You didn't mention any other mods installed, so no idea if you have that mod or feature enabled.