This error occurs when you try to upload a file through WordPress that is larger than the upload_max_filesize limit.
How to increase this limit in PHP depends on your hosting provider. The best course of action is to contact their support and ask them to increase the limit, or ask them for help on how to increase it.
For a short-term solution, if you know where to upload the files, you can upload them manually through FTP. For example, for the Beaver Builder plugin, you can extract the files from the zip directory and FTP them to the following location: