Stuck at archiving

Hello,

I am trying to export my website to a file but every time I try to do this it keeps stuck at archiving, and not every time on the same percentage. I am using a free license.

It keeps stuck for example on: Archiving 4611 files… 48.00% complete.

I only experience this problem with this website (http://www.palmpower.nl) and not with other websites.

My role in WordPress is ‘Administrator’ but im not THE first user (admin) from the website. For example I can’t use the editor in either the tabs ‘Plugins’ and ‘Appearance’. Is this maybe the problem?

https://ww.wp.xz.cn/plugins/all-in-one-wp-migration/