A. Clear your browser cache and cookies. Sometimes, outdated or corrupted cache files can cause issues with web applications. To do this, go to your browser settings, find the privacy or history section, and select the option to clear browsing data. Make sure to select cookies and cached images and files. After clearing, restart your browser and try the top-up process again.

B. Try using a different browser or device. If the issue persists, switching to another browser (like Chrome, Firefox, or Edge) or using a mobile device may help bypass the bug.