what does this mean?

its mean lua issuse 
It usually happens when there is a non-English letter in the mode.

@Mairusss how do i fix it?

@Carsss_offical1234 If the mod is yours, change the non-English letters to English and it will work. 
Also make clear cache

@Mairusss i cleaned my cache but idk how to do that 

@Carsss_offical1234 
You can try deactivating the downloaded mods one by one. When you deactivate the mode that is causing the error, the Lua error goes away.

@Mairusss i dont have any mods in my  game i deleted them