If you found this file online from an untrusted source, be careful. RAR files can sometimes contain malware or "zip bombs." It's always a good idea to run it through a scanner like VirusTotal before opening.
We can lead with the specific error it resolves and provide step-by-step instructions. lorbitsy.rar
To help me write a "proper post" for you, could you share a bit more context? Depending on what's inside, here are a few ways we could frame it: If you found this file online from an