Fatal error: Uncaught exception ‘Exception’

I haven’t seen an answer for this in the forum, or I missed it – anyway please help!

Fatal error: Uncaught exception ‘Exception’ with message ‘Preapproval
failed: User is not allowed to perform this action’ in
/home/mmsmmagn/public_html/wp-content/themes/funding_press/funding/paypal.php:83
Stack trace: #0
/home/mmsmmagn/public_html/wp-content/themes/funding_press/funding/funding.php(251):
F_PayPal->get_auth_url(Object(WP_Post), Object(WP_Post),
Object(WP_Post)) #1
/home/mmsmmagn/public_html/wp-includes/plugin.php(406):
F_Controller->action_template_redirect(”) #2
/home/mmsmmagn/public_html/wp-includes/template-loader.php(7):
do_action() #3 /home/mmsmmagn/public_html/wp-blog-header.php(16):
require_once(‘/home/mmsmmagn/…’) #4
/home/mmsmmagn/public_html/index.php(17): require(‘/home/mmsmmagn/…’)
#5 {main} thrown in
/home/mmsmmagn/public_html/wp-content/themes/funding_press/funding/paypal.php
on line 83