sorry system is 4.0.0-beta8-dev

please check the php setting max_input_vars
if its at 1000 change it in php to 2000

set to 2k problem still occurs.

php 7.4

max_execution_time:30
max_input_time: -1
max_input_vars: 2000
memory_limit: 128m

was just an idea. sorry it didnt help

Please provide the exact XML file you are using.

http://joonextpro.com/joonextpro.zip is the template file i use to install

you have invalid xml - thats why you have the problem

ok. but works fine without debugging

Firstly on install you are doing something crazy that breaks Joomla 4 admin template...

And I am able to edit the template ok:

But editing template styles I get a Memory issue writing log files:

webserver_1  | 2021/05/31 18:37:23 [error] 29#29: *42 FastCGI sent in stderr: "PHP message: PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /application/libraries/src/Log/LogEntry.php on line 121PHP message: PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /application/libraries/vendor/symfony/error-handler/Error/OutOfMemoryError.php on line 1PHP message: PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 307200 bytes) in Unknown on line 0" while reading response header from upstream, client: 172.19.0.1, server

Fix all the extra that you have on line 290

39,721 characters on one line is pretty crazy - no wonder you didnt see the errors

I can load the edit page now, and all I did was refresh the page a few times...

The problem is a simple running out of PHP Memory

Im guessing that the overhead of storing the debug information and logging is adding some memory use before the page gets to render your insanely large form fieldsets :)

You might also want to fix this, when enabling your template and visiting the frontend:

The root problem is logging in Joomla 4... the following is called, which kills Joomla on 128Mb memory_limit

// Get the current call stack and back trace (without args to save memory).
$this->callStack = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);

guys thank you so much. i will close this for now, i can move further with your valued tips! It's mainly the google fonts i load in the option boxes, i will fix that issue. thank you again!

there are other ways to do it if you really want to list all google fonts. Your current method is not sustainable as it will always be out of date as google add and remove fonts.