HP Officejet Pro 9015 Printer Offline
Open the HP Print and Scan Doctor tool.
Choose the name of your printer and wait until the HP Officejet Pro 9015 Troubleshooting tool finds the issue.
Click Yes if the tool prompts you to enable the printer updates.
Make your HP Officejet Pro 9015 printer as the Default Printer.
Check if the drivers are installed correctly.
Try to reset your printer if you are still facing the issue.