I solved this problem but I have another problem

When I click on the following sections in the admin panel, I still get a 500 error.
Reference Section, Brand Section, Blog section, Team Member Section
Also I cannot upload images. I can't change logos and favicon. I think this has to do with file permissions but I'm not sure.
I also want to ask another question;
There is version 1.4 in the file. How can I update this? Did you update and upload it or do I have to update it manually?
Even though I did the update, the 500 error continues.
I cannot intervene in many places in the Section section. Even when I click on these sections in the admin panel, I get a 500 error.
Please help me to fix this
@Prometheus_