I can't download mods with "Download with Manager"

[Punicpunch]

Whenever I try to download with manager, I get the following error:

"Firefox can't find the file at nxm://Skyrim/mods/3863/files/1000172397."

 

Obviously, I use Mozilla Firefox and the mod used for this example was SkyUI.

 

The same error pops up when I download any other mods.

 

For example, Unofficial Skyrim Patch:

"Firefox can't find the file at nxm://Skyrim/mods/19/files/1000177250."

And Immersive Weapons:

"Firefox can't find the file at nxm://Skyrim/mods/27644/files/1000023285."

[Greg]

Run nxmhandler.exe in the Mod Organizer folder, select the appropriate game/binary from the list, and click Register active to see if this solves the problem.

[Punicpunch]

Run nxmhandler.exe in the Mod Organizer folder, select the appropriate game/binary from the list, and click Register active to see if this solves the problem.

Didn't seem to work.

[GrantSP]

Try the suggestions in this thread.

[Punicpunch]

Try the suggestions in this thread.

Thank you very much, I knew it was something like this but I didn't know where to find help.

 

All of my thanks.