2670783 - SecureStore files must be available on Unix. Check if the global directory is mounted

During a SAP system installation (ASCS/SCS or PAS) SWPM throws the following error

ERROR 2018-07-17 12:27:34.070 (root/sapinst) (startInstallation) [CSiStepExecute.cpp:1108] id=controller.stepExecuted errno=FCO-00011 CSiStepExecute::execute()The step askSecStoreFiles with step key |NW_Java_CI|ind|ind|ind|ind|0|0|NW_CI_Instance|ind|ind|ind|ind|ci|0|askSecStoreFiles was executed with status ERROR (Last error reported by the step: Assertion failed: in function () { if (!NWInstall.getSystem(context.get("sid")).isSecStoreAvailable()) { ASSERT(arguments.callee, !installer.onUnix(), "SecureStore files must be available on Unix. Check if the global directory is mounted."); context.makeChangeable("secStoreSrcDir"); var client = new ClientMapping(); client.mapContextParameter("secStoreSrcDir", "'secStoreSrcDir'"); installer.setKdbClient(client.getMapping()); gui.invokeDialog({sid:"d_nw_ask_secstore_files"}); } else { context.makeUnchangeable("secStoreSrcDir"); }}
: SecureStore files must be available on Unix. Check if the global directory is mounted).

SWPM

SecureStore Files, Unix, SWPM, SAPinst, SecStoreFiles, ASCS, SCS, PAS, DB, sapmnt, global , KBA , BC-INS-SWPM , Installation with Software Provisioning Manager , Problem