# \#heartland-secure-submit **URL:** https://community.gravityforms.com/tag/heartland-secure-submit/2536.md [Latest](https://community.gravityforms.com/latest.md) · [Categories](https://community.gravityforms.com/categories.md) · [Tags](https://community.gravityforms.com/tags.md) --- ## [Attempt to assign property "is\_line\_item" on bool](https://community.gravityforms.com/t/attempt-to-assign-property-is-line-item-on-bool/15495)
**Author:** [@mediarealm](https://community.gravityforms.com/u/mediarealm)\ **Replies:** 2\ **Last updated:** [July 12, 2023, 1:25am UTC](https://community.gravityforms.com/t/attempt-to-assign-property-is-line-item-on-bool/15495 "2023-07-12T01:25:13Z")
Hello, I was just wondering if anyone else running Gravity Forms on PHP 8.1 has encountered this error? PHP Fatal error: Uncaught Error: Attempt to assign property “is\_line\_item” on bool in /wp-content/plugins/gravity…