This article explains how to proceed when you are trying to upload a new firmware version and you are getting the following message: "Please wait!" for more than 5 minutes.
This release includes significant user interface changes and many new features that are different from the SonicOS 6.5 and earlier firmware. The below resolution is for customers using SonicOS 7.X firmware.
NOTE: If you are experience this message while you are trying to upload a new firmware version just keep in mind that this message will be showed, but if it is taking more than 5 minutes fallow these steps:

Try to open the firewall from incognito mode


Open another browser
Upload the firmware from safe mode
This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. The below resolution is for customers using SonicOS 6.5 firmware.
NOTE: If you are experience this message while you are trying to upload a new firmware version just keep in mind that this message will be showed, but if it is taking more than 5 minutes fallow these steps:

Try to open the firewall from incognito mode

Open another browser
Upload the firmware from safe mode