If you get an error while uploading or installing a theme, please check the error message first.
Usually these errors are related to the PHP configuration of your hosting. The theme/plug-in manufacturer specifies values such as «memory limit» for the plug-in/theme to be uploaded without problems.
The PHP configuration can be found in the overview of the Control Panel under «Websites» - «Web settings».
A more detailed guide to php configuration can be found here: Customizing the configuration
max_file_upload 128M
post_max_size 128M
max_execution_time 300
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