Thank you, Erel.
I have done that, and this is what I get...
Preparing boards...
2021-01-12T11:57:13.582Z INFO c.a.u.n.HttpConnectionManager:153 [cc.arduino.packages.discoverers.serial.SerialDiscovery] Connect to
https://builder.arduino.cc/builder/v1/boards/0x10C4/0xEA60, method=GET, request id=650428EB5AAD4DDA
Verifying...
2021-01-12T11:57:14.277Z INFO c.a.u.n.HttpConnectionManager:157 [cc.arduino.packages.discoverers.serial.SerialDiscovery] Request complete URL="https://builder.arduino.cc/builder/v1/boards/0x10C4/0xEA60", method=GET, response code=404, request id=650428EB5AAD4DDA, headers={null=[HTTP/1.1 404 Not Found], Cache-Control=[no-cache, no-store, must-revalidate], Server=[nginx], Connection=[keep-alive], Vary=[Origin], Pragma=[no-cache], Expires=[0], Content-Length=[0], Date=[Tue, 12 Jan 2021 11:57:14 GMT]}
2021-01-12T11:57:14.277Z WARN p.a.h.BoardCloudResolver:64 [cc.arduino.packages.discoverers.serial.SerialDiscovery] Fail to get the Vid Pid information from the builder response code=404
C:\Users\webpu\AppData\Local\Arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\2.5.0-4-b40a506/bin/xtensa-lx106-elf-ar: unable to rename 'C:\Users\webpu\Dropbox\B4X\Code\EXAMPL~4\B4R-AN~1\B4RANE~1\Objects\bin\core\core.a'; reason: File exists
exit status 1