I get the following error when trying to create the dynamic-security file, but there is still memory in that path.
$ mosquitto_ctrl dynsec init dynamic-security.json user
New password for user: 
Reenter password for user: 
dynsec init: Out of memory.
Error: Out of memory.
$ df -h .
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme0n1p3  433G  116G  295G  29% /
The mosquitto_dynamic_security.so is located at
        /usr/lib/x86_64-linux-gnu
      
Your help is very much appreciated
Best regards,
Angela