Impossible access (error 500) after upgrade 4.7.16

[Kosmos_1999]

Hi everyone,

Since I upgraded my forum in 4.7.16, I cannot access my board anymore.

When accessing via the main url I get this error message

a

 

And when trying to access via Admin url, this one:

Do you heva any idea where it could come from?

Thank you in advance for your help

Edited April 18 by Kosmos_1999

[Daniel F]

Sounds like an incompatible php version. 
Make sure that you’re using php 8.0.0 or higher 

[Kosmos_1999]

Hello Daniel F,

Many thanks for your help, I upgraded to PHP 8.2 and it works

[teraßyte]

2 hours ago, Kosmos_1999 said:

I upgraded to PHP 8.2 and it works

PHP 8.2 is not supported. Downgrade to either 8.0 or 8.1.