This is still an issue and being reported in email alerts from Solid Security (formerly iThemes Security) twice a day for some time now. I hope that @powr will please take a look at this. It’s never fun to tell a client that they need to find a replacement plugin for one that they have relied on for so long.
The latest version 2.2.1 of a plugin don’t have any issues: https://wordpress.org/plugins/powr-pack
and patchstack alerts are about version 2.1.0.
That is a bit confusing, since the version at https://wordpress.org/plugins/powr-pack/ is still 2.1.0 and there appears to be no 2.2.1 update available at https://wordpress.org/plugins/powr-pack/ nor with the WordPress Dashboard > Plugins section of websites running 2.1.0
Is 2.2.1 only available via special means?
Good to see 2.2.1 is now in the repository and scans clean now. Thanks devs.
While I can’t speak on behalf of the OP, this should probably be marked as Resolved since the new POWR version 2.2.1 fixes the issue.