Failed to open MS_ERRORFILE (production platform)

[nmtoken]

Whilst trying to use the Mapserver-definition test on the HOVER dataset ntt_epsg_3034 receive error:

HTTP Status 500 ? Internal Server Error

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Type Status Report

Message msSetErrorFile(): General error message. Failed to open MS_ERRORFILE /mapserver/logs/ms_error.txt

[nmtoken]

Same issue testing gc3d_gsi_limits_copy1 as part of investigation of #570