Community strings will not be sent to the browser unless "Allow Secure Data on Website" (in the System Manager) is enabled.
It's not in system manager any more. I'm on 9.5 SP4 currently. On that version anyway, it's on the admin web console under Orion Polling Settings. Under the Calculations & Thresholds section, there is a check box labeled "Allow Secure Data On Website (advanced). I don't know if it's moved since 9.5 or not.
ATTN Solarwinds Dev
You might want to change this in the accounts details area where it is wrongly referencing System Manager. (NPM 10 RC3)