First of all, That is not the greater than symbol, that is the less than symbol. The temp is over 73, so this rule will not fire. So, this is not the cause of your errors. What type of device is device 1185? If you click on the link to the left, the dev number, that will highlight what device this is. Also, you can click on "error" and it will launch the edit device page in a new tab.
You have Notify "Hub Link"....what type of device is that?
Also, you do realize that this rule is going to fire every time there is a temperature reading below (or above if you fix it) 73, correct? Rule machine number triggers are not Thresholds. They are statewise. Every time a value is received, it is evaluated and checked against the trigger value. Even if it has been previously triggered, the rule will fire again. So, every time the temp sensor updates and is below( or above) 73, the echo will speak that phrase. Every single time. If that is every minute, then it will speak it every minute.