jry

I've been using Mod Organizer 2 for both Skyrim and Fallout 4 with zero crashes while typically having an overhaul mod along with 20 to 30 other mods and patches. I tried Vortex and found it problematic too. Since Nexus Mod Manager is known to have issues, you should give MO2 a try.

In SkyUI in the MCM general settings there is an option to configure the stack size of items you are moving around. Setting this to zero makes it so you can automatically sell one item at a time but then you can increase it to something else so moving stuff around is not so tedious. I would love to see a mod that can toggle this option between 0 and 3 or something else. There is a mod here that does it but it is for the old Skyrim not second edition. https://www.reddit.com/r/skyrimrequiem/comments/5d6gug/toggle_skyui_quantity_menu_with_one_key/

This issue still exists in both the newest version of MO2 published on Nexus and the newer beta version on github. If I ignore the error the download succeeds but only the free CDN server is found and I am a premium member so it should show me all available servers for premium users. Downloading manually works with IDM.