Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 12.0.2): 17.0.2
Operating system and version (eg, Ubuntu 17.04): Fedora 31
Apache or nginx version (eg, Apache 2.4.25): nginx
PHP version (eg, 7.1):
The issue you are facing:
This is an issue on the Desktop Client 2.6.2 running on Fedora 31 - will not display a way to connect; no server URL connection field.
Is this more of an issues to post on the github site?
I recently moved my Nextcloud server instance on Digital Ocean from an Ubuntu server snap install to a container running on CentOS 7. The instance is up and running without issues. I can confirm a client connection works fine from the Android mobile app.
In this desktop client at first attempt, I was able to remove the old URL and enter the new URL. When I selected the Next button, nothing happened. I closed the client and reopened to be faced with the current issue of no URL connection field.
Screenshot:
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
The output of your Nextcloud log in Admin > Logging:
PASTE HERE
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
PASTE HERE
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE