[Jorvans]

Hi Serkan,

Thank you for your reply.

PHP was still running on an outdated version, 7.1. This has been converted to 8.4. Unfortunately, I am still unable to import the data.

Based on the requirements you have specified, I can see that my current web hosting is insufficient (web host is Strato). After contacting my hosting provider, they said the following:

I would like to inform you that unfortunately the data in your WordPress environment cannot be changed.
I understand that this is not the answer you were hoping for.
The reason why these changes cannot be made is that certain settings or configurations within the WordPress environment are fixed and cannot simply be changed via our system.
I would like to point out that STRATO does not offer support for the WordPress environment itself. For further support or alternative solutions, please visit the official WordPress website: http://www.wordpress.org

Can this be changed via WordPress itself, or is it advisable to move my domain?

Could these settings be causing the problem of not being able to upload?