Error - After upgrade SuiteCRM from 8.4.0 to 8.5.0 "Help" not opening in Knowledge Base editor and it's not displaying any messages when we click the button

[rsp]

Is it similar issue?

Mouseover "help text" not showing in 8.5

After a clean install of 8.5 including adding 7.x customization, the field “help” text does not show on mouseover. The help text is showing in the field edit but not on mouseover when creating a new account, contact, or opportunity. Any suggestions?