https://github.com/google/cloud-print-connector/issues/476#issuecomment-574354522
" This might happen because, at least from cups README.md file, from CUPS v2.3b4: Removed support for -D_IPP_PRIVATE_STRUCTURES=1 developer cheat - the IPP accessor functions should be used instead. "
https:/ /github. com/google/ cloud-print- connector/ issues/ 476#issuecommen t-574354522
" This might happen because, at least from cups README.md file, from CUPS v2.3b4: Removed support for -D_IPP_ PRIVATE_ STRUCTURES= 1 developer cheat - the IPP accessor functions should be used instead. "