SkinsInstaller.php Array to string conversion Error

[jcc5169]

I am getting this error in PyroCMS 3.6 on PHP 7.2.15 -- any ideas?

composer require websemantics/pyrocms-theme

Using version ^1.2 for websemantics/pyrocms-theme ./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) Package operations: 7 installs, 1 update, 0 removals

• Updating anomaly/url-field_type (v2.2.13 => v2.2.12): Loading from cache

In SkinsInstaller.php line 24:

Array to string conversion