i was install WICD network manager but it was show no connection available.
that’s why i wanna step back to previous default network manager but without internet connection i can’t install default network manager.
Where is your network manager in the menu or in the panel?
If in the taskbar, usually at the top, move the cursor, right-click on the manager panel icon, in the opened menu put a tick-connect wifi network or cable Internet.
This is not attentive)), it happens after experimenting with wifi adapters, panic))), you need to be careful.