This is only on the profile timeline feed, the error shows at the top. The post to the profile timeline never actually "post."
I've still not tried to fix it.
Long ago before 9.0.0 was released, I started my site June 2016. It was a beta then and I had problems when it was upgraded to 9.0.0, I had to have AlexT fix it to show back then and this was simular.
I'm going to start looking at the actual files that show in the errors.
My hope is this will be a simple fix or I will have to again revert back to 9.0.1 using the last backup before upgrade to B1, B2 will be out soon so I hope It'll address some of my issues. I've informed all members not to change much via my Discord Server that is incorported into the site. They all like the new look and features.
I'm not going to complain because I know this is a Beta release and not intended for a live active site. just try to report the errors for the developers.
Like the one about site guest able to edit all media titles and was posted to Git and fixed already.