Thank you for providing the requested troubleshoot file.
Based on the provided troubleshoot file, it can be noted that your mobile device (72:3f:3b:c9:42:50) can connect to your WIFI (RUT955_1CBB) and successfully authenticate, but can not automatically get an IP address.
The backup file provided shows that DHCP service is disabled on interface "lan". We strongly recommend enabling DHCP on the interface so that your devices can automatically get IP addresses. Another option would be to configure static IP address, subnet mask, gateway and DNS server on your devices.
Also choose "lan" instead of "wan" under Network section of the General Setup on Wireless Interface Configuration.
Kindly implement the suggested changes and provide feedback.