USB printer not recognized by Opera but no problem with Firefox

I suggest you post on an Opera forum too.

What is the output of:

lsb_release -a; uname -a; apt-cachge policy opera

Thanks

Thank you for your quick response.
Here is the information you requested:

john@john-H81M-S2H-GSM:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.2 LTS
Release: 18.04
Codename: bionic
john@john-H81M-S2H-GSM:~$ uname -a
Linux john-H81M-S2H-GSM 4.18.0-21-generic #22~18.04.1-Ubuntu SMP Thu May 16 15:07:19 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
john@john-H81M-S2H-GSM:~$ apt-cachge policy opera

Command 'apt-cachge' not found, did you mean:

  command 'apt-cache' from deb apt

Try: sudo apt install <deb name>

john@john-H81M-S2H-GSM:~$ apt-cache policy opera
opera:
  Installed: (none)
  Candidate: 12.16.1860
  Version table:
     12.16.1860 500
        500 https://deb.opera.com/opera-stable stable/non-free amd64 Packages
john@john-H81M-S2H-GSM:~$

Thanks, typo

I suggest you report a bug.

It seems I had two versions of Opera installed and when I deleted one version it all worked.
Thank you once again for all your help
John