I'm a new user of Lightroom classic . after installing arc , it won't open . what is wrong..?

[태석35815479rgxh]

I'm a new user of Lightroom classic . after installing arc , it won't open . what is wrong..? I already paid for this

[JohanElzenga]

Arc? Do you perhaps mean ACR (Adobe Camera Raw)? Lightroom Classic does not use the separately installed ACR, it has its own built-in ACR routines.

[dj_paige]

I'm a new user of Lightroom classic . after installing arc , it won't open . what is wrong..?

By @태석35815479rgxh

What won't open? What does "it" refer to? Lightroom Classic? ARC? Something else? Do you get an error message? If so, what is the exact unedited word-for-word error message?