Clicking on the register button does not open the registration form

Describe the issue or problem

Clicking on the register button does not open the registration form .
When trying to register a user through the user tab inside the site, an error occurs. In the dashboard on my admin account, i em checked the settings under Users & Role > Site Access Options > User Registration. I am selected the first option to allow users to register with my journal.
Steps I took leading up to the issue
For example:

  1. Go to ‘…’
  2. Click on ‘…’
  3. Scroll down to ‘…’
  4. See error

What application are you using?
For example, OJS 3.1.2.1

Additional information
Please add any screenshots, logs or other information we can use to investigate this problem.

Hi @actahistorica,

Your OJS version is too old, we’re not supporting it anymore (see ojs/SECURITY.md at main · pkp/ojs · GitHub), so I advise you to get it upgraded to 3.3.x, and the error will probably be solved automatically.

Best,
Jonas Raoni