Refused to evaluate a string as JavaScript because ‘unsafe-eval’ is not an allowed source of script in the following Content Security Policy directive:
Meanwhile the solution is easy. Use executeScript _Sandbox:
{
"Command": "executeScript_Sandbox",
"Target": "return 1000 + Math.floor(Math.random()*60000); ",
"Value": "waittime"
},
{
"Command": "pause",
"Target": "${waittime}",
"Value": ""
},