PHP fatal error why installing Acquia’s Custom Objects plugin

Product Support Mautic 5 Install/Upgrade Support
1

Your software
My Mautic version is: 5.02
My PHP version is: 8.0.21
My Database type and version is:MYSQL8

Your problem
My problem is:
Hello guys i got this error why installing Acquia’s Custom Objects plugin please i need help (How to install Acquia's Custom Objects plugin?)

error: PHP Fatal error: Uncaught Error: Undefined constant Mautic\LeadBundle\LeadEvents::LIST_FILTERS_MERGE in /var/www/html/mautic/plugins/CustomObjectsBundle/EventListener/SegmentFiltersMergeSubscriber.php:27 Stack trace:
These errors are showing in the log:

Steps I have tried to fix the problem: I deleted my cash but it’s still showing thesmae error

Error
Error1467×532 45.7 KB

2

Hi, did you solve the issue. I’m also trying to install in on M5, and tired almost all the branches, still nothing?

4

no luck here too.
and now i have my mautic down…

i guess that nobody is using it on M5. also the same with twitter plugin on M5.
considering going back to M4…