How can I fix things when Catalina will not connect to smb shares? Based on proposed solutions at:
What causes some Network Drives using SMB no longer connect to macOS Catalina?

I have edited the /etc/nsmb.conf which worked for about seven (7) days, and now nothing.  I verified that the edited lines are intact after a system update from apple. 

I am using Samba version 4.7.6.

On server side I set the smb.conf file in GLOBAL settings to include the line:

min protocol = SMB2
(I have also tried, min protocol = SMB3) different server, same result (no connection). 

somewhat at wit's end.  May have to roll back from Catalina.  

I can access the servers from android devices and Windows 10
SOLVED:   Kept working on this and deleted the existing servers from the list on the "Connect to Server" (FINDER, GO, CONNECT TO SERVER) list.  Then browsed for servers and VOILA, CONNECTED!!!!