When installing ABRA Flexi on a Linux server, the installation may fail if the cs_CZ.utf8 language pack is not available on the system. ABRA Flexi always requires this locale — without it, the application cannot be installed or operated.
How to resolve the issue:
install the cs_CZ.utf8 language pack on the system
once the installation is complete, run the ABRA Flexi installation again
Summary:
ABRA Flexi requires the Czech language pack cs_CZ.utf8. If it is missing from the system, the installation will fail.