HELP : How to install userscript directly with Pale Moon ?

I test "Pale Moon" as alternative to Firefox :
I have installed Greasemonkey but when in want install a script from Greasy fork it only show the code of it and don't offer the install popup ....
How to solve that ?

PS: The manual instal (copy the code and instal new script from clipboard) don't work too ...

I suspect you need to install an older version of Greasemonkey, try GM 1.6

Thanks!
Chrome suck...
Firefox too ...
And Pale Moon....
:-)

there is a great mozilla addon called classicthemerestorer. highly recommend

I test "Pale Moon" as alternative to Firefox :
I have installed Greasemonkey

Greasemonkey 1.15 works for me... NOT 1.16
https://github.com/greasemonkey/greasemonkey/issues/2038
OR:
You need to install Guerilla Scripting instead of Greasemonkey.
And I still have not figured out Guerilla... it is lacking in too many ways... and I have given up on it. I thought I would test it for future use if Greasemonkey fails in future PaleMoon versions.
https://addons.palemoon.org/extensions/all-extensions/
https://addons.palemoon.org/extensions/other/guerilla-scripting/

Someone is working on forking Greasemonkey for Pale Moon.
Greasemonkey 3.9.3.1 works nicely on Pale Moon 27.2.1, and there is also 3.12b6 if you are more daring.