Hello,
First– these must be updated, as we had to alter some of our templates for the WooCommerce 3.0+ update. Our version 1.4.0 had the updated templates. You can see our changelogs here to see which templates were updated:
https://www.wcvendors.com/help/topic/pro-updates/#post-61048
Overrides: jessica/wc-vendors/dashboard/dashboard.php
jessica/wc-vendors/dashboard/nav.php
jessica/wc-vendors/dashboard/product-edit.php version 1.3.2 is out of date. The core version is 1.3.10
jessica/wc-vendors/dashboard/quick-links.php version – is out of date. The core version is 1.1.5
jessica/wc-vendors/dashboard/store-settings.php version 1.3.7 is out of date. The core version is 1.4.0
jessica/wc-vendors/front/pro-vendor-list.php
jessica/wc-vendors/store/store-header.php
jessica/wc-vendors/store/store-ratings.php
For Stripe… you should be able to see errors in the error_log file if it is an internal server error.
For paypal.. is the commissions being split? GO to: wp admin > woocommerce > commissions.. do you see that the payment has been split properly?
PayPal sandbox can sometimes be stupid.. sometimes small live transactions are necessary to see if it is actually working.