The message is accurate...something about that charging source is not compatible with the BB requirements. Either the amperage, the USB pin configuration, or something else may be the problem. Are you using your OEM USB cord? If not, try that. If it continues, then it is likely not fixable by anything on the BB side.
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.