I upgraded to Joomla 5.4.0 Stable yesterday and the all frontend pages are failing. Backend is alright and also is frontend editing through PageBuilder.
Are some of the Overrides not correct? Difficult for me to tell.

Please advice. I have backup of both previous version and current. But I hesitate to roll back before you have a chance to see what has gone wrong.

Thanks // Jörgen

Here are some system information:

System Information

version: Joomla! 5.4.0 Stable [ Kutegemea ] 14-October-2025 16:00 GMT
compatpluginenabled: true
compatpluginparameters:
phpversion: 8.4.13
php: Linux cpanel01.powerhosting.se 5.14.0-570.49.1.el9_6.x86_64 #1 SMP PREEMPT_DYNAMIC Tue Sep 30 07:46:13 EDT 2025 x86_64
dbserver: mysql
dbversion: 10.11.14-MariaDB-cll-lve
dbcollation: latin1_swedish_ci
dbconnectioncollation: utf8mb4_general_ci
dbconnectionencryption:
dbconnencryptsupported: false
server: Apache
sapi_name: cgi-fcgi
useragent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

=============
PHP Settings

memory_limit: 128M
upload_max_filesize: 70M
post_max_size: 80M
display_errors: true
short_open_tag: true
file_uploads: true
output_buffering: true
open_basedir:
session.save_path: xxxxxx
session.auto_start: 0
disable_functions:
xml: true
zlib: true
zip: true
mbstring: true
fileinfo: true
gd: true
iconv: true
intl: true
max_input_vars: 1000