That didn’t work…but I figured out what I did “wrong”. Actually, it was something that I didn’t have to do in the previous installation but I somehow do now (I don’t know why). I need to specify a “Domain” in the web-based interface. Previously I left it blank.
So, to add a share, one has to enter:
- Host
- Share
- Remote subfolder
- Domain
- Username
- Password
Host, Share, Username, and Password were required and, in the previous version, they were the only values I filled in. After trying what you did, it led me sudo phpquery -v 7.2 -s apache2 -m smbclient, which also indicated that all was fine. (I previously did not know of the phpenmod command – thank you!)
I then tried changing to a more simple password using more verbose output: sudo smbpasswd owncloud -D 10 (Yes, I was getting very desperate…thinking that punctuation marks were being disallowed in the password 
) and this output caught my eye:
pdb_set_homedir: setting home dir \\[server name]\owncloud, was
Once I tried that, it connected fine! I’m not sure if it was something in ownCloud or Samba…but I am using the same smb.conf file… Anyway, I appreciate your help the past day! It wasn’t the solution to my problem, but it did help me figure out what I should focus on. I’d been stuck for a day before I posted my message… 
Thanks a lot!!
Ray