Apache remains the most popular environment for SHTML files. Here is how to apply the on Apache (versions 2.2 through 2.4+).
The server process (e.g., www-data on Linux) must have read permission for both the parent .shtml file and the included file. Use chmod 644 footer.shtml to grant read access. Additionally, confirm the file exists. A typo in footr.shtml will fail silently, leaving no error in the browser. view shtml fix