v4.1.0 of Optional Shipping Insurance plugin is now available for download: https://www.zen-cart.com/downloads.php?do=file&id=232

Updates for continued operation under Zen Cart v2.1.0+, Edit Orders v5.0.3+ and PHP 8.0+.

This version contains updates for these GitHub issues:

#2: Correct session-variable handling/initialization.
#3: Add support (with polyfill) for zc300's zen_config function.