Your application is not loading and you have identified the following error in the Apache error.log file :
.htaccess: <IfModule not allowed here
Resolution
Consolidate .htaccess files in your Git codebase which are outside the /docroot/ directory, or strategically comment out code in .htaccess files outside the /docroot/ directory until you are able to pinpoint the culprit. The primary .htaccess file for your codebase is located at:
/docroot/.htaccess
How to resolve "IfModule not allowed here" errors | Acquia Product Documentation