System not responding after update

After running the built in update to the latest version when I tried to open the company dashboard I get this error:

Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 8.1.0".

So I changed my system PHP to "PHP 8.1 (ea-php81)".

Now when I try to open the company dashboard I just get a blank page!

I dont have console access to the server hosting my install so I used a CRON task to do:
/usr/local/bin/ea-php81 /home/visrico/public_html/erm/artisan -vvv update:all

And the result:
Starting update...
Updating core...
The command /usr/local/bin/php artisan update core 1 failed.

Exit Code: 255(Unknown error)

Working directory: /home/visrico/public_html/erm

Output:
================


Error Output:
================

Not able to update core!

So what can I try next?

I'm not getting a lot of diagnostic info in any log files. I have this in my .env file:
APP_DEBUG=true

When I try to load my dashboard, i get two errors in the PHP log:
12-May-2023 13:12:44 UTC] PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 65536 bytes) in /home/visrico/public_html/akt/vendor/genealabs/laravel-model-caching/src/CacheKey.php on line 61
[12-May-2023 13:12:44 UTC] PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 65536 bytes) in /home/visrico/public_html/akt/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php on line 230

I dont seem to have access to the server syslog file. Is there a setting to redirect errors to a log file?