Hello,
First of all, please delete the plugins CMB2 and Redux Framework they are no more needed https://xtemos.com/docs/woodmart/faq-guides/3-x-4-0-migration-guide/
If you have any problems (these problems are often caused by the host security or size max size limitations) you can upload and install via Dashboard > Plugins or FTP.
1. Make the full backup of your site.
2. Deactivate and delete the current version.
3. Upload the new version from your portfolio on this forum.
4. Upload and install.
Do not worry please, such a way of update never brakes the site.
If you have modified the theme files, remove the customization, and check the option to update the plugin automatically. Try to deactivate all the plugins and check. In none helps, contact your host support let them suggest.
Best Regards