Sass functions error when using rem()

I came across this relevant post on StackOverflow...
https://stackoverflow.com/a/76878307

The CSS rem() function required 2 parameters: https://developer.mozilla.org/en-US/docs/Web/CSS/rem

The rem() CSS function returns a remainder left over when the first parameter is divided by the second parameter, similar to the JavaScript remainder operator (%)

If you created a custom rem() function, I suggest naming it something else as there could be a conflict.

I changed the name of the function from rem() to rem-calc() and replaced the instances where it is used.
This cleared up my errors.

provided patch acoording to comment#3,please review.

@dineshkumarbollu
Your patch also needs to change the name of the actual function in sass/abstracts/_functions.scss to rem-calc()

@JonesUI
Thanks for review, I am providing new patch please review.