If you are brother printer, user and facing brother printer offline issue don’t worry follow the five points and fix the brother printer offline issues.
Ink toner blockage
Printer is not set as default
Error in the network connection between your computer and printer.
Corrupted or outdated printer drivers.
If the printers ‘use offline mode’ is selected, it may also show the offline error. Wrong printer settings.
For more information visit at.https://www.printerfixingerror.com/blog/how-to-fix-brother-printer-offline/