Extension will not install

Install failures are often caused by upload limits or an incomplete package.

Almost every failed install comes down to one of three things: the upload never completed, PHP refused the file size, or the wrong ZIP was chosen. Work through them in order before opening a ticket.

1. Check the package

Upload the ZIP exactly as downloaded. Do not unzip it first, and do not upload a ZIP that contains another ZIP unless the documentation says it is a package. If your browser expanded the archive on download, fetch it again with that setting off.

2. Raise the PHP limits

Large packages need headroom in several settings at once:

upload_max_filesize = 32M
post_max_size = 32M
max_execution_time = 120
memory_limit = 256M

Joomla shows the effective values under System, System Information, PHP Information. If you cannot edit them, use the Install from URL or Install from Folder tab instead, which bypasses the browser upload entirely.

3. Confirm folder permissions

Joomla needs to write to tmp and to the target extension folders. A "JFolder::create: could not create directory" message points at permissions or an incorrect tmp path rather than the package itself.

Still failing

Attach the exact installer message, your Joomla and PHP versions, and whether Install from URL behaves differently. That combination usually identifies the cause on the first reply.