Username : only number are accepted

Some of my visitors can register using a username with letters and or/numbers, but for unknown reasons, some others can only register with a username made of numbers only (for exemple 22345 will be accepted, but ab345 will not). whatever their machine client of browser. I am on OJS3.1.01. Thank you in advance.

Hi @cverger,

This is not behavior that should be different for different users; can you replicate any of this behavior yourself?

Alec Smecher
Public Knowledge Project Team