Invalid action in rule

[laurian.cuzma]

hello
I have this error

device is a group of dimmers. Is I use 30 as value instead of variable is working.
rule is 5.0
I see in an 5.1 rule is not such error
Thanks

[bravenel]

Known bug in 5.0. Harmless UI glitch.

[laurian.cuzma]

thanks