One thing to mend ojsxml/app/classes/IssuesXmlBuilder.php, and some thing to mention in the README

[kosson]

The script has an unwanted round parenthesis, line 397, at the end, see ojsxml/app/classes/IssuesXmlBuilder.php.
.
It must be mentioned, that the script needs the following packages to be installed so that SQLite3 is available, and the specific error is silenced.
Needed to be installed in case of Ubuntu 24.04: sudo apt install sqlite3 php-sqlite3.

It would be very useful to be mentioned that a prior check with php -m for the xmlwriter would eliminate the specific error concerning the module.
If it is not installed, one should do the following on Ubuntu 24.04: sudo apt install php8.3-mbstring php8.3-bcmath php8.3-zip php8.3-gd php8.3-curl php8.3-xml -y.