Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
If you are still using CentOS 7.9, it's time to convert to Alma 8 with the free centos2alma tool by Plesk or Plesk Migrator. Please let us know your experiences or concerns in this thread: CentOS2Alma discussion
a possible fix
try this one: http://kb.toderu.ro/?p=405
applied on horde 3.1.7 with plesk 9.3, not sure that on other versions of horde will work.
mabe you will have to replace that name of function in more files.