Articles are not saved in OJS:

Current version OJS:
PHP version: 7.3.19-1~deb10u1
Apache version: Apache/2.4.38 (Debian)

Hello! Can you please help with one problem?

I got a problem in OJS. The fact is that in the OJS database itself I am trying to send an article, submitting an article consists of 5 stages, but after clicking the save and continue button, it does not go to the fourth stage, it just starts an endless download (the download circle is spinning), the author of the article is not saved. I checked on the local Open Server, everything works there, but there is an endless load on the institute’s server. I checked the files with errors, but there are mostly cosmetic errors that could not affect this way (files and data about our version are presented below).

However, using the browser I debugged it and it gives an error after clicking save (“DB Error: Field ‘author_id’ doesn’t have a default value”). I went to the phpmyadmin of our site, and did not quite understand what the problem was, since everything seems to be correctly spelled out in terms of sql regarding ‘author_id’ (screenshots below). At the same time, this error began to belong to error 200, previously belonged to error 500. Or is it just a statement by the browser and the error may be in a completely different place?
Have you faced a similar problem?

Regards, Alexey.
Thank you.

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