Test page prints OK, but apps can't find printer Ubuntu 20.04

[Richard J Uschold]

I have Ubuntu 20.04 and my printer stopped working. I don't print often, but it worked a few months ago. The test page from: System->Administration->Printers works fine. A week ago I tried 6 apps, none printed. While printing a one page document, some apps print dozens of blank pages. I have to terminate the print job. Some apps don't have a printer listed as a destination, only Save as PDF.

I use the MATE desktop.
System->Administration->Printers displays 1 printer: "Brother HL L2350DW series"
  Test page prints OK

2020 Nov 04 testing:

Xemacs - many blank pages. Job not in queue.
Firefox - many blank pages. Job not in queue. Firefox worked in September.
LibraOffice - many blank pages. Job not in queue.
Thunderbird - many blank pages. Job not in queue.
Brave Browser (based on Chromium) - Printer was not on the list of available printers!
  The Destination printer is only "Save as PDF" Clicking "See More ..."
  searches for a little while and finds nothing.
Chromium. Printer was not on the list of available printers! Behaves just like Brave.

2020 Nov 09 testing:

Firefox - lists the printer three times! (Note my computer name is ceres)
  Brother-HL-L2350DW-series - many blank pages. Job not in queue
  Brother_HL_L2350DW_series - prints OK. job in queue but labeled: "printer error"
  Brother_HL_L2350DW_series-ceres- prints OK. job in queue but labeled: "printer error"
  last week, I'm pretty sure I only tried the first printer in the list.

LibraOffice - job in queue but labeled Held. I selected "Release". No effect. I selected "Release"
  again. This time it printed! Queue labled: "printer error" while processing.

Thunderbird - lists the same three printers as Firefox.
  Brother-HL-L2350DW-series - many blank pages. Job not in queue
  Brother_HL_L2350DW_series - prints OK. job in queue but labeled: "printer error"
  Brother_HL_L2350DW_series-ceres- prints OK. job in queue but labeled: "printer error"
  again, last week, I'm pretty sure I only tried the first printer in the list.
Brave Browser and Chromium - Printer was not on the list of available printers!
  The Destination printer is only "Save as PDF" Clicking "See More ..."
  searches for a little while and finds nothing. (Same as last week)

[Richard J Uschold (gilliganu1)]

The Affects is NOT CORRECT! Somehow I accidentally selected subiquity when I created this bug. hat is wrong! Affects should be: linux (Ubuntu). I tried to change it to: linux (Ubuntu), but that option does not show up as an option to be selected. Maybe some one can tell me how to change the Affects.