ERROR 500 when I setup PHP 8.00 with my OJS 3.3.0-15

I was working with my OJS 3.3.0-15 in PHP 7,4. It worked very slow so I tried to setup muy PHP server from 7,4 to 8.00 release. The OJS stop working with Error 500. The error log said this problem:

[01-Nov-2023 16:05:50 UTC] PHP Fatal error: Uncaught Exception: DateTime::__construct(): Invalid date.timezone value ‘UTC-3’, we selected the timezone ‘UTC’ for now. in /home9/iaa/public_html/ojs/lib/pkp/classes/i18n/
Stack trace:
#0 /home9/iaa/public_html/ojs/lib/pkp/classes/i18n/ DateTime->__construct()
#1 /home9/iaa/public_html/ojs/lib/pkp/classes/core/ PKPLocale::initialize(Object(Request))
#2 /home9/iaa/public_html/ojs/lib/pkp/classes/core/ Dispatcher->dispatch(Object(Request))
#3 /home9/iaa/public_html/ojs/index.php(68): PKPApplication->execute()
#4 {main}
thrown in /home9/iaa/public_html/ojs/lib/pkp/classes/i18n/ on line 306

While I´m looking for this error, I setup my PHP release in 7,4 again and it works fine (but slow)

Dear @Webrodleir,

It seems there’s something wrong with your timezone in php.ini, please double-check that it matches the timezone set in (these are the ones available:

Best regards,

That´s right, Jnoronha! I change the timezone in the with my country. But I still have the same problem… And it´s very slow when in articles and Archive of issues…

Hi @Webrodleir,

Sorry for the delay, somehow I missed your reply. Try disabling “custom locale” plugin, if active, and remove any other locale than English under “administration > site settings”, you can enable them again after.

Best regards,

I will try to do that recomendation… Thanks!