Steps to reproduce:
1. Turn off your internet connection.
2. Open CCleaner
3. Click Tools
4. Click Software Updater
5. See task manager, CCleaner is starting to show "not responding" status.
6. After that, CCleaner will show error message: An error occured with code: Failed To Make Connection (26)
7. I try to close CCleaner window, the window has been succesfully closed but the error message still show and I cannot close it.
8. I must End Task CCleaner process on Task Manager to close that error message.
Product version: CCleaner 5.64.7613
This bug always happen.
This is steps to reproduce video about this bug: https://streamable.com/qpuha