Fix Linux Mint codename

installJRMC

@@ -1610,14 +1610,24 @@ update_self() {
     extract_version() {
         local version_line
         version_line=$(grep -m 1 'SCRIPT_VERSION=' "$1")
+
+        if [[ -z "$version_line" ]]; then
+            echo "Error: SCRIPT_VERSION not found in $1" >&2
+            return 1
+        fi
+
         version_line=${version_line#*=}  # Remove everything before and including '='
         version_line=${version_line#\"}  # Remove leading '"'
         version_line=${version_line%\"}  # Remove trailing '"'
         version_line=${version_line%-dev}  # Remove '-dev' suffix if present
+
         echo "$version_line"
     }
 
 
+
+
+
     echo HERE
 
     # Check if we're in a git directory and if it's the installJRMC repository