Hey guys, If you have trouble installing gacha club then I have a solution for the PC version. Just follow the instructions below :
1. Install Winrar (Press "Download Winrar" on the website): https://www.win-rar.com/start.html?&L=0
2. Install the gacha club file after the Winrar installation
3. Double click the gacha club file and click " Z - zip > Extract to gacha club/"
Then boom! Just extract it then you're done! I hope it helps! :)