First, the frustration was great because I only had a QWERTY layout on my Lenovo A1 with the keyboard. Using a tool Remedy managed, but because the lack of ALT GR key came painfully to the fore.
After I changed the layout files manually, everything is going well. Instead Alt-Gr I can now normal Alt key to use for. As @ about Alt + Q to get.
The error can probably locate the Androidsystem when at the keyboard.
The pairing ran flawlessly right from the start.
Fun Fact: Ctrl + Alt + Del will work for my Lenovo Pad for reseten. ; O)