TS6320 not scanning

[CKDesign]

I am running Mac OS Catalina 10.15.4 and my Canon TS6320 will not scan. it will print fine but I get an error saying

"Failed to open a connection to the device (-21345)" when trying to open the scanner. 

[Danny]

Hi, CKDesign!

So that the Community can help you better, we need to know exactly which application you're using to scan. That, and any other details you'd like to give will help the Community better understand your issue!

If this is a time-sensitive matter, click HERE search our knowledge base or find additional support options HERE.

Thanks and have a great day!

[CKDesign]

I am just using the printer/scanner window that pops up under system preferences.

[Patrick]

Hi CKDesign,

Please try scanning using the IJ Scan Utility.  This can be downloaded from our web site:

https://www.usa.canon.com/internet/portal/us/home/support/details/printers/inkjet-multifunction/ts-s...

Once installed, please use this application to scan.

For more information regarding the IJ Scan Utility, please use this link:

https://ugp01.c-ij.com/ij/webmanual/ScanUtilityLite/M/3.2/EN/SUL/Top.html

If you are unable to scan, what error code appears when you attempt to scan using the IJ Scan Utility?