Step 1: How to resolved these types of errors, as shown in the screenshot below
If you found the issue similar to given above then its Ioncube and PHP Version issue.
Please follow the below steps:
Step 1: Go to Client Area
Step 2: Download the the Build for Php5.6-Php7.1-IonCube-10.2
Step 3: Extract the build
Step 4: Go to following path in extracted build whmcs\modules\addons\
