How do I turn on "always-on" for an Azure Function?
<p>I have a Function App with 3 functions, one of them timer-triggered every 2 minutes. I observed that after a while, the function stops being triggered, but restarts when I go to the portal.</p>

<p>As I understand it, the reason is that by default, "Always On" is turned off. However, when I go to Application Settings / General Settings, I cannot activate the "On" state, which is grayed out. I can un-check "Off", which doesn't seem to stick or activate "On".</p>

<p><a href="https://i.stack.imgur.com/WxJoo.png" rel="noreferrer"><img src="https://i.stack.imgur.com/WxJoo.png" alt="enter image description here"></a></p>

<p>Am I missing something obvious? Is Always-On the solution to my problem, or is there something else I should do?</p>

<p><em>Note: the functions are written in F#; I doubt it matters, but I thought I would mention it just in case.</em></p>