Changed the file: steamapps/common/Master of Orion 1/dosbox/dosbox like this:

--- dosbox.orig	2025-04-26 19:52:45.860433894 +0200
+++ dosbox	2025-04-26 19:53:14.430177160 +0200
@@ -7,14 +7,14 @@
 
 # check architecture and run executable
 if [ "$ARCH" == "x86_64" ]; then
-  export LD_LIBRARY_PATH="${CURRENT_DIR}/libs/x86_64"
+  export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${CURRENT_DIR}/libs/x86_64"
   echo "Starting DOSBox"
   "${CURRENT_DIR}/dosbox_x86_64" "$@"
     
 fi
 
 if [ "$ARCH" == "i686" ]; then
-  export LD_LIBRARY_PATH="${CURRENT_DIR}/libs/i686"
+  export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${CURRENT_DIR}/libs/i686"
   echo "Starting DOSBox"
    "${CURRENT_DIR}/dosbox_i686" "$@"
 fi

That is, added the ${LD_LIBRARY_PATH}:

Does not start without modifying dosbox script