Hi there (@muhammadSaferagic),
the mapping to the underlying debian version seems to be broken. You have to add the following line:
check_alt "Continuum" "Continuum" "Debian" "stretch"

I understand Continuum is declared and I see it in the code
but I tried to install nodejs 10 on Linux MX Continuum and this error still there
because it call https://deb.nodesource.com/node_10.x/dists/Continuum/Release instead of https://deb.nodesource.com/node_10.x/dists/stretch/Release
Reading package lists... Done
## Confirming "Continuum" is supported...
+ curl -sLf -o /dev/null 'https://deb.nodesource.com/node_10.x/dists/Continuum/Release'
## Your distribution, identified as "Continuum", is not currently supported, please contact NodeSource at https://github.com/nodesource/distributions/issues if you think this is incorrect or would like your distribution to be considered for support
@jodumont,
have you tried the fix proposed here [1]? v.10 installed just fine for me.
[1] https://github.com/nodesource/distributions/issues/811#issuecomment-475995571
[2]

@dominikk I didn't understood before you point it out;
when I look at it it make sense and will work :)
I confirm that adding the line mentioned at https://github.com/nodesource/distributions/issues/811#issuecomment-475995571 works
@muhammadSaferagic Linux MX 18 Continuum is now supported!
Thanks for your patient, closing this issue now.
Most helpful comment
@dominikk I didn't understood before you point it out;
when I look at it it make sense and will work :)