when i try to upload a product from the Magento 1.9.3 backoffice i get a "500 internal server error". See image.
What can this error depend on?
Did you install any extension recently?
Any changes made on server side recently if you remember?
Few other options to trace
I have not installed anything or made any other changes.
I think the error is this in the error log:
2021-03-14T13: 53: 34 + 00: 00 ERR (3): Deprecated functionality: The each () function is deprecated. This message will be suppressed on further calls in /public_html/lib/Zend/Cache/Backend.php on line 79
2021-03-15 18:25:57 UTC [apache][access_compat:error] [pid 87638] [client 184.108.40.206:42016] AH01797: client denied by server configuration: /home/u2-h9twb2rhnkzm/www/mywebsite.it/public_html/app/etc/local.xml
You should lower your php version to 5.6 and try.
If its not available go for php7 and install this inchoo php7 compatibility extension. I am hoping you won't have installed the patch from Magento