I just succeded to migrate from J! 3.10.2 to J!4.0.3 on a local server xampp php 8.
The backend is working fine, I tried successfully some page modifications which have been correctly saved.
The frontend displays many errors:
* a message appears before all the modules (modify the module xxxx Position:yyyy), only when logged in. I swithced 0 instead of 1 on line 197 of Module Helper.php but it doesn't change anything...(see MaJJ4-3.jpeg)
* the web links are working but they appear with a warning just before each of them, (see MaJJ4-5.jpeg)
* if you click on Componants, JD Builder, Pages, or on Integrations, you get an 500 error message. I followed the instructions and changed $debug = false by true, Pages Category is working.
As long Ias I cannot fix these issues, I cannot upgrade the commercial site.
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