I can't upload file in file manager

[JxstErg1]

Adding this snippet of article to what @KangJL said, as you were probably trying to upload your CMS:

@Admin

Installing large scripts

A particular software package may be larger than 10 MB in size. Because of this limit, you cannot upload the archive directly and have it extracted on the server. However, you can easily upload the contents manually.

To do so, you will first need a good FTP file manager for your desktop and setup an FTP connection. See the how to upload files with FTP article for more information about that.

Then, take the downloaded software and extract the archive file on your computer. This will create a new directory with all of the files contained in the script.

From your FTP client, find the extracted directory on your own computer. Then, select all files and folders in that directory and copy them to the right folder in your account. For full website software, you probably need to upload the files to the htdocs folder.

Your FTP client will then transfer all the files from your computer. Depending on the size of the script and the speed of your internet connection, it could take between a few minutes to a few hours to complete. However, this is the most reliable, and yet fairly easy, way to upload larger pieces of software.