I have a GS1900-24HP switch and in the management interface, most of the text does not appear...

Same issue report before. Looks like the problem relate to browser and firmware 2.30 or above version can solve the problem.You can refer the following link to check more detail.

https://businessforum.zyxel.com/discussion/745/no-description-for-radio-buttons-on-gui-page-of-vlan-port-settings#latest

I am not sure the Internet Explorer can work correctly. You can have a try and upgrade to latest firmware to solve issue.
Another way is that you can use ZON Utility to upgrade firmware.

Ace said:

Same issue report before. Looks like the problem relate to browser and firmware 2.30 or above version can solve the problem.You can refer the following link to check more detail.

https://businessforum.zyxel.com/discussion/745/no-description-for-radio-buttons-on-gui-page-of-vlan-port-settings#latest

I am not sure the Internet Explorer can work correctly. You can have a try and upgrade to latest firmware to solve issue.
Another way is that you can use ZON Utility to upgrade firmware.

Thank you!!!
I am a newbie and I am looking for solve this problem
thank you again