Call to undefined function stcr\is_plugin_active() in wp-content/plugins/subscribe-to-comments-reloaded/utils/stcr_upgrade.php:175

[abertolli]

I'm not sure what is causing this to happen, but it happens every once in a while (on a multi-user site), and I suspect it's either on a plugin upgrade or a WP upgrade.

Observed:

• WordPress reports an internal error
• When checking the error log find: Call to undefined function stcr\is_plugin_active() in ... stcr_upgrade.php:175
• Comment out line 175 to access the site and determine the cause
• There is a notice in admin panel about "subscription data from Subscribe to Comments Reloaded < v2.0"
• Link to "Settings -> Subscribe to Comments" doesn't exist because don't have "Subscribe to Comments" (old software)
• Putting line 175 back in now doesn't seem to be a problem/reproduce the error (until a later date, maybe on upgrade?)

My only guess as to why this happens only once is because something is getting checked for upgrade on each version?

[BobaWebDev]

Hi @abertolli

Thanks for reporting, we'll test that out.

It shouldn't even get to execute line 175. Definitely related to the multisite functionality.