Steps to reproduce the problem

• Create 2 Accounts in the same workspace
• Both write comments in the activity Log
• Delete one user
• Try to access actitivy Log in the post again -> will return error 500

Expected behaviour

Comments should be still working and visible, maybe with a [DELETED USER] Flag

Actual behaviour

Error 500

Detailed description

Logs says the following

[2026-02-12 19:29:06] production.ERROR: Call to a member function only() on null {"userId":1,"exception":"[object] (Error(code: 0): Call to a member function only() on null at /home/cleavr/project-path/20260212060027874/vendor/inovector/mixpost-pro-team/src/Concerns/Model/PostActivity/Comment.php:64)

Specifications

Mixpost
4.6.0.0