board selector

I have the following error when select Tools / Board selector option ... Not valid result, verify InnerException exception ... Any idea ? Thank you in advance.

Hello Erel, could you import the ESP8266 ESP-07 Board to the "Board Selector"? At this time there are ESP-12 an ESP-13 Boards an many other but no ESP-07. ESP8266 ESP-07: I have problems by setting up the "Generic ESP8266 Board" to use this with my ESP-07 board. THX

Hello Erel, is it possible to save the selected board like ESP8266 in the project? So that the "Board Selector" is set automaticly? When i work with an ESP8266 board an load a new project with an ESP32, the "Board Selector" stays on the last selection and didn´t change with the loaded project...