Bug introduced in $CloudVersion V1.38 or earlier and fixed in V1.46
[...] I checked and reproduced your issue, and have passed along a report to our developers on the same [...]
[CASE:3973757]
Here's an example from docs:
CloudDeploy[
Manipulate[
EmbeddedHTML @ StringTemplate["
<!DOCTYPE html>
<html><body><h2 style=\"color:`1`\">
This text is `1`.
</h2></body></html>
"][color],
{
{color, "red"},
{"red" -> Red, "green" -> Green, "blue" -> Blue}
},
ControlPlacement -> Left, ContentSize -> 350
],
Permissions -> "Public"
]
It used to work, any tips how to fix it?