Error in contact page in Magento 2.1 site

Question

i am new at Magento and i need your help. When i open the contact page on my site, i receive this error.

"We're sorry, an error has occurred while generating this email."

I checked the system.log file and i found that.

Could you help me ?

[2020-11-19 14:58:18] main.CRITICAL: Recoverable Error: Argument 2 passed to Hashcrypt\Contact\Plugin\AddFieldToContactForm::afterToHtml() must be an instance of Hashcrypt\Contact\Plugin\string, string given, called in /var/www/vhosts/ora24.gr/httpdocs/vendor/magento/framework/Interception/Interceptor.php on line 152 and defined in /var/www/vhosts/ora24.gr/httpdocs/app/code/Hashcrypt/Contact/Plugin/AddFieldToContactForm.php on line 20 [] []

Answer 1

As you see in the system.log this error is showing at the below path: app/code/Hashcrypt/Contact/Plugin/AddFieldToContactForm.php on line 20 Please check this or you can check by disabling this module "Hashcrypt_Contact".