I’ve downloaded the Mac OS Desktop Client and it installed on my Mac running Mojave (10.14.6).
When I try to connect to my NextCloud server (http://library.wscc.mb.c) it takes me to my browser and says:
“Connect to your account”
“Please log in before granting Mozilla/5.0 (Macintosh) mural/3.0.1git (build 3355) (Nextcloud) access to your Nexcloud account.”
“Log in ->”
I click on “Log in ->” and I get:
“You are about to grant Mozilla.5.0 (Macintosh) mural.3.0.1git (build 3355) (Nextcloud) access to your Nextcloud account.”
“Grant Access ->”
I do that and I get:
“Your client should now be connected!”
“You can close this window”
So I do close the window and go back to the NextCloud client.
It mulls the situation for a couple of seconds and then returns to the screen that asks for the Server Address. In red letters below it says:
And does nothing further.
When I check on my NextCloud web client: Settings: Security: Devices & sessions:
it lists a recent Sync client - Macintosh 4 minutes ago
In fact it lists a whole lot of sessions . . . repetitions of unsuccessful connections.
No error codes, no other indications of something going wrong.