Internal Error: Command name "notification:overdue-tasks" is invalid

I just installed Kanboard to a new server.

  1. Downloaded kanboard-1.2.22 to /www/var/html/apps/

  2. Issued the following commands:

  • tar -xf kanboard-1.2.22
  • cd kanboard-1.2.22
  • chown -Rf apache:apache ./data
  • chmod -Rf 755 ./data
  • chcon -R -t httpd_sys_rw_content ./data

open a web browser and go to http://messickc.com/apps/kanboard-1.2.22/ and get the following error:
“Internal Error: Command name “notification:overdue-tasks” is invalid.”

I have every php module needed for the application to run installed (at least, I don’t get any warnings to the contrary). All other web pages are working fine. PHP 8.0.17 - phpinfo()

Any clue what’s up? I am guessing something with my configuration as every version I have tried has this same problem.

Contents of the debug file are unhelpful, at least to me:

[2022-04-19 19:18:59] [debug] APP: nb_queries=0
[2022-04-19 19:18:59] [debug] APP: rendering_time=0.0079858303070068
[2022-04-19 19:18:59] [debug] APP: memory_usage=1.06M
[2022-04-19 19:18:59] [debug] APP: uri=/apps/kanboard-1.2.22/
[2022-04-19 19:18:59] [debug] ###############################################

UPDATE: I have traced the error back to the preg_match() php function. Google search says that upgrading libpcre2 from version 10.36 to 10.39 will solve the issue; however I am running Fedora 35 and version 10.39 ships with the distro.

UPDATE: (since I can’t delete or edit the original post, for whatever reason) PROBLEM SOLVED. Wound up having to update my entire webserver

dnf upgrade --refresh