Note -> Please take backup before applying patch
Step 1: Download the patch, as shown in the screenshot below, After downloading the patch download the build version which is compatible with your php version, so that you can replace the add-on module.
Step 2: After extracting the built got to the path as shown in the screenshot (\whmcs\modules\addons\ -> In local ) and (/modules/addons/ -> In server )
Note : Please keep the backup of the existing folder in you local
Step 3: Now from local go to the patch folder that you have extracted
Step 4: Now navigate to the path shown below in the screenshot on both local and server, then upload the selected files as shown below to the given path.
Step 5: Now Drag the file to upload templates patch screenshot given below
Step 6: Now upload orderform patch screenshot given below for same
Step 7: Now Drag the file to upload orderforms patch screenshot given below
Step 8: Now Replace the addon module so that you are on same version
Go to following path in local and server [whmcs/modules/addons]
Step 9 : Now Drag the file to upload addon module screenshot given below
