Fatal Error

Hello, I recently deleted the plugin and wanted to reinstall because forms were not showing up in InfusionSoft. When I went to reinstall I received the following error:

Warning: count(): Parameter must be an array or an object that implements Countable in /home/content/a2pewpnaspod04_data03/19/41296619/html/wp-content/plugins/infusionsoft-official-opt-in-forms/subscription/infusionsoft/xmlrpc/lib/xmlrpc.inc on line 2649

Fatal error: Uncaught InfusionsoftWordPressSDKException: Failed to parse XML-RPC request: Invalid byte 1 of 1-byte UTF-8 sequence. in /home/content/a2pewpnaspod04_data03/19/41296619/html/wp-content/plugins/infusionsoft-official-opt-in-forms/subscription/infusionsoft/InfusionsoftWordPressSDK.php:209 Stack trace: #0 /home/content/a2pewpnaspod04_data03/19/41296619/html/wp-content/plugins/infusionsoft-official-opt-in-forms/subscription/infusionsoft/InfusionsoftWordPressSDK.php(1019): InfusionsoftWordPressSDK->methodCaller(‘WordPressServic…’, Array) #1 /home/content/a2pewpnaspod04_data03/19/41296619/html/wp-content/plugins/infusionsoft-official-opt-in-forms/includes/classes/integrations/class.infusionsoft-infusionsoft.php(55): InfusionsoftWordPressSDK->syncWordPressOptins(Array) #2 /home/content/a2pewpnaspod04_data03/19/41296619/html/wp-content/plugins/infusionsoft-official-opt-in-forms/infusionsoft.php(4048): infusionsoft_infusionsoft->sync_optins(‘my383’, ‘8beb4a2b598ba85…’, Array) #3 /home/content/a2pewpnaspod04_data03/ in /home/content/a2pewpnaspod04_data03/19/41296619/html/wp-content/plugins/infusionsoft-official-opt-in-forms/subscription/infusionsoft/InfusionsoftWordPressSDK.php on line 209