quickbook-sync-rto-invioces

"""
Client error: `POST https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer` resulted in a `401 Unauthorized` response:\n
{"error":"invalid_client"}\n
"""
"deleting 106143..."

Notice: Undefined variable: response in /home/souq/public_html/wp-content/plugins/quickbook360/QB/Classes/Intuit.php on line 255

Fatal error: Uncaught Error: Call to a member function getBody() on null in /home/souq/public_html/wp-content/plugins/quickbook360/QB/Classes/Intuit.php:255 Stack trace: #0 /home/souq/public_html/wp-content/plugins/quickbook360/QB/Classes/Intuit.php(216): QB\Classes\Intuit->query('select * from i...', 1) #1 /home/souq/public_html/wp-content/plugins/quickbook360/QB/Classes/QuickBooks.php(50): QB\Classes\Intuit->getInvoice('747') #2 /home/souq/public_html/wp-includes/shortcodes.php(319): QB\Classes\QuickBooks->removeRtoInvoices('', '', 'quickbook-sync-...') #3 [internal function]: do_shortcode_tag(Array) #4 /home/souq/public_html/wp-includes/shortcodes.php(197): preg_replace_callback('/\\[(\\[?)(quickb...', 'do_shortcode_ta...', '[quickbook-sync...') #5 /home/souq/public_html/wp-includes/class-wp-hook.php(286): do_shortcode('[quickbook-sync...') #6 /home/souq/public_html/wp-includes/plugin.php(203): WP_Hook->apply_filters('[quickbook-sync...', Array) #7 /home/souq/public_html/wp-includes/post-template.php(240): apply_filter in /home/souq/public_html/wp-content/plugins/quickbook360/QB/Classes/Intuit.php on line 255